Daily Work Organizer
Put your HW next to your DWO.
Remember to pick up your graded work
fromofthe
box!
Question
the Day:
How do we know
Tuesday
how far stars are from earth?
Do Now:
Is your intelligence something very basic about
you that you can’t really change?
Why or why not?
Agenda:
• Introduction to Light
• Cornell notes
Homework:
Homework
Finish Cornell
Notes
Readers Theatre
Excerpt from: The secret to raising smart kids
1. Read the paragraph out loud together
2. Read every other line and switch
 (partner 1 will read the first line, and
partner 2 will read the second)
3. When you get to the end of the
paragraph, start again! Try using funny
accents!
It’s what we see…
Light Speed
• light around the
•
•
earth
300,000,000 m/s
3 x 108 m/s
Light Speed
• Just over a
second from the
moon
Light Speed
• 8 minutes
from the sun
Light Speed
• 4.2 years from
Alpha Centauri!
(second nearest
star)
Lightyear
How far light
travels in 1 year
• 170, 000 lightyears away
• How many years ago did it occur?
Refraction
• the bending of light when passing
through a new (transparent) substance
Plane Mirrors:
The Flat Mirrors
Plane Mirrors
• Incident ray hits the
•
•
mirror
Reflected ray is the
ray that bounces off
The Normal is the
perpendicular line
from mirror
Parallax
real screw
(behind mirror)
• Parallax can be used
•
•
to find image location
Parallax makes
objects appear to
move when not in the
image of screw
same place
Try it
mirror
Parallax
Parallax
• Move head to the side
• If the image and real
•
screw separate, then
not at same place
Try it
mirror
Parallax
• If the two move
•
together, they are at
same place
Try it
mirror
How do scientists calculate
the distance between Earth
and some other star?
Remember to pick
up your graded
work from the box!
Now, to the Lab
Part I (pg 6)
Daily Work Organizer
Monday
Question of the Day:
Do Now:
Draw a ray of light that strikes a mirror at an
angle of 30° from the mirror
Draw, measure, and label the: Normal, Incident &
reflective angles.
Bonus: How could you calculate the Incident &
Reflective angles without drawing anything?
Agenda:
• Cornell notes
Homework
Homework:
Finish Cornell Notes
Reading Log for pg 23
Homework problems: pg 14-17
Due on Wednesday/Thursday
Every Scholar: Problems 1, 2, 3
Honors physics: above problems plus 4
Due Friday
Every Scholar: Problems 6, 7, 10
Honors physics: above problems plus 8, 9
Extra Credit:
problem 5 & any Honors problems
Lab 1 (pg 6-11)
Due Today by 3:45pm
to room 308
Also: Several scholars forgot to write their
names on their labs...
TURN IN DAILY WORK ORGANIZERS!
Jobs
Whiteboard eraser
Powerpoint master
2 students to Handback
assignments
Salary: 1 ticket per day
Challenge Problems
Do Challenge problems when you
are done with classwork
Excellent chance to review material that
will be on the test!
Later on it will become an excellent
opportunity to review old material that
will be on the final
Turn in completed worksheets to the
folder and receive 3 tickets
Upcoming events
1st physics problem set due soon!
Advice:
• Work with friends
• Start NOW (Do not wait till last minute)
• Ask for help!
Binder quiz
1st quiz on Friday
Vocab
Incidence
Incidence
Angle
mirror
Word
The intersection
of light with a
surface
Definition
Picture that reminds you of definition
Intersection
Word or words that remind you of definition
Sentence using word
Whenever light strikes a surface, the angle
of incidence is equal to the angle of
Vocab
Reflection
Reflected
Angle
mirror
Word
An amount of light,
heat or sound that
is thrown back
Definition
Picture that reminds you of definition
Throwing back,
bouncing off,
Word or words that remind you of definition
Sentence using word
Both Edward Cullen and Dracula cannot see
their reflections in the mirror. How do they
style their hair?
Vocab
Normal
normal
mirror
Word
A perpendicular
(90°) intersection
of a line or surface
Definition
Sentence using word
Picture that reminds you of definition
Perpendicular,
right angle, 90°
Word or words that remind you of definition
The line normal to the mirror is 90° from the
mirror. The normal is between the incident
and reflected rays.
Reflection
Virtual
Image of
the nose
2 Laws of Reflection
 i = r
Object
distanc
e
Image
= distance
 di to mirror) =
do (to mirror)
Image Formation
Diffuse Reflectors
What is a summery?
INCLUDES ALL MAIN POINTS!
A paragraph written in full
sentences.
Example: The angle of incidence is equal
to the angle of Reflection. The Normal is
an imaginary line drawn 90 degrees to the
mirror and is an equal number of degrees
from both the incident and reflected rays.
Daily Work Organizer
Monday
Question of the Day:
Do Now:
Complete Reflection worksheet #1
When done: Start on Worksheet #2 or #3
Agenda:
• Homework Questions
• Vocab
• Reflection Worksheet
• Lab Grades
Homework
Homework:
Problems 1, 2, 3
Honors: + 4
Find the Object
Let’s try it
turn to pg 15
Find the Object
Actual path of
light
Image to eye
Apparent
14.5ofcm
path
light
Object
14.5 cm
Yourself in a Mirror
Minimum
height of
mirror?
Tip for #4
Work backwards! Where do the rays
need to reach to let everything be
seen?
Tip for #6
In order to focus you camera you
must know the distance between
the camera and the image
Class Points
aka: Tickets for everyone!
100% homework completion
Everyone is in their seats, silently doing
the Do Now when the bell rings
Vocab
Parallel lines
Parallel
Word
Parallel lines always
have the same distance
between them
Definition
Picture that reminds you of definition
•
•
•
Parallel of latitude
Never crossing
并行 (?)
Word or words that remind you of definition
Sentence using word
Parallel lines will never cross
Black Holes
The mass inside a black hole is
infinitely large.
Vocab
Infinite ∞
无限
Word
Limitless or endless.
Impossible to
measure or calculate
Definition
Picture that reminds you of definition
Black Holes!
Larger than the
largest number
Word or words that remind you of definition
Sentence using word
The mass inside a black hole is infinitely
large.
The number closest to 0 that is not 0 is
Vocab
Image
Word
An optical appearance
produced by light.
Definition
Picture that reminds you of definition
•
•
Light rays
Not always behind
a mirror or lens
Word or words that remind you of definition
Sentence using word
Interesting fact: the image is not always
BEHIND the mirror!
Vocab
Object
Word
The physical object
that produces an image
Definition
Picture that reminds you of definition
•
Examples: ME
when I look in the
mirror!
Word or words that remind you of definition
Sentence using word
When Bella looks into the mirror she is the
object. Her reflection is the image.
Reflection Lab Grades
Total possible points: 50
Examples
• -2 on the front means you
earned 48 / 50 points or 96%
• -10 on the front means you
earned 40 / 50 points or 80%
Common Shortfalls =(
No Full Sentences
Ex:
4.2cm and 4.5 cm. 5%
What is 4.2cm???
Example of a great response:
The distance from the object to the mirror is
7.7cm and the distance from the mirror to the
image is 7.6cm. The percent difference is
1.3% which indicates that these distances are
very close.
Common Shortfalls =(
Not labeling the Image in Part 1
Step 9 of the procedure
says: Label the image
If you want to discuss lab grades:
1. Write a note. Staple it to the lab and
turn it into the re-grade folder
2. Talk to me after school in room 308
Lab Corrections
Due 1 week from the day it was due
(MONDAY  Tuesday)
Correct your lab and staple a note to
the front telling me:
1. what you corrected
2. your original mistake
NOTE: You can not earn points
back by labeling the image…
st
1
Quiz on Friday!
Be prepared!
What will the quiz cover?
o Worksheets from class
o Homework
o Vocabulary
Daily Work Organizer
Wednesday
Question of the Day:
Do Now:
Continue to work on Reflection
Worksheets
If you finish: Challenge Problems! =)
Fridays Homework:
Corrections to first
Agenda:
Homework
problem set
• Homework review
Problems 6, 7, 8
• Curved mirrors (42)
Honors: + 9, 10
Problem 1
What happens to the surface
of the road when it is wet?
Water fills in crevices
(bumps)
creating
a
Why?
smooth surface for
light to reflect upon
Reflection on a smooth
surface
Headlight on a dry road
Headlight on a dry road
Vocab
Image
Word
An optical appearance
produced by light.
Definition
Picture that reminds you of definition
•
•
Light rays
Not always behind
a mirror or lens
Word or words that remind you of definition
Sentence using word
Interesting fact: the image is not always
BEHIND the mirror!
Vocab
Object
Word
The physical object
that produces an image
Definition
Picture that reminds you of definition
•
Examples: ME
when I look in the
mirror!
Word or words that remind you of definition
Sentence using word
When you look into the mirror you are the
object. Your reflection is the image.
Vocab
Converge
Word
Come together from
different directions to
eventually meet
Definition
Picture that reminds you of definition
•
•
•
Come together
Cross
Eventually meet
Word or words that remind you of definition
Sentence using word
The students will converge in the cafeteria
Vocab
Diverge
Word
Separate and go in
different directions
Definition
Picture that reminds you of definition
•
•
•
Separate
Grow apart
Turn away
Word or words that remind you of definition
Sentence using word
Monkeys and Humans diverged from a
common ancestor
Daily Work Organizer
Question of the Day:
Friday
A man is standing between 2
parallel mirrors and facing left.
Do Now:
2.0 m
Agenda:
mirror
• Homework review
• Quiz
1.0 m
Homework
Tuesday’s Homework:
Page 24-27
Extra Credit: pg 20
If you did any extra
credit problems
1. Write your name on
the homework
2. Staple your homework
3. Turn it in TODAY
Do Now
A man is standing between 2
parallel mirrors looking to the
left.
How far away
mirror
from the
object
person are the
first three
1.0 m
images he
2.0 m
1.0 m sees?
2.0 m
mirror
3.0 m
Problem 6
mirror
image
object
4.5 m
2.0 m
2.0 m
4.5 m
Problem 7:
25° with the surface
of the mirror… ?
But what is theθquestion
is
= incident angle
asking?
90° = θ + 25°
normal
90° – 25° = θ
θ
65° = θ
25°
Mirror
Reflection problem 10
Virtual
Image of
the nose
Daily Work Organizer
Tuesday
Question of the Day:
Do Now:
Agenda:
Cornell notes
Last week’s quiz
Discuss Activity pg 24-27
Lab demo
HomeworkHomework:
Read Lab 2 (34-35)
Turn in Activity pgs 2428
Pre-Lab (honors)
Curved Mirrors
Curved Mirror Vocab
 C = center of curvature
 radius of curvature
 f = focal point - rays converge
 F = focal length
f=C/2
C
f
Vocab
Center of
Curvature
Word
Picture that reminds you of definition
Radius of the sphere the
• Center of sphere
mirror was made from
Definition
Word or words that remind you of definition
Sentence using word
The center of curvature of a 10 meter sphere
is 5 meters
Vocab
Focal Point
f
Word
Picture that reminds you of definition
Point at which rays
converge (come
together)
•
•
•
Definition
Word or words that remind you of definition
Where rays cross
“ “ come together
“ “ intersect
Sentence using word
Every ray crosses the focal point
Do Now: 4 problems
1. The
Where
is the
center of curvature
of of
1.
center
of curvature
is the center
12 inch basketball?
the abasketball
= 6 inches radially inwards
2. A curved mirror has a center of
16 cm.
the of
2.curvature
The focaloflength
is What
½ the iscenter
focal length?
curvature = 8cm
What is the center of
curvature of a golden globe
award?
(the diameter
of
the
globe
The center of curvature is the center of
the sphere
is 10 cm)
5 cm
What is the focal length of the
death star laser if the radius
of the laser dish is 120m?
The focal length is ½ the center of
curvature
= 60 meters
Homework problems: pg 28
Due on Wednesday/Thursday
Every Scholar:
Read Lab 2 (pg 34-35)
Activity pages 24 - 28
Honors physics: Above plus Pre-lab
Due Friday
Every Scholar: Lab 2 (pgs 34-37)
Extra credit miniExtra
project
on page 20
Credit:
Eye chart mini project pg 20
Jobs
Whiteboard eraser
Powerpoint master
2 students to Handback
assignments
Salary: 1 ticket per day
BoBA
Binder of Brilliant Answers
BoBA can be found in room 308
Excellent way to check your HW
answers
Make sure you’re studying the
right answers before tests &
quizzes
Class Goal!
Class Goal!
QUIZ!
1°
2°
3°
4°
6°
Class
Class
Class
Class
Class
Average:
Average:
Average:
Average:
Average:
85%
74%
65.3%
73.8%
70.3%
Quiz Retakes
Friday at lunch, 12:25pm or after
school at 3:25pm, Room 308
No late entry permitted
Option 1: Turn in your corrected 1st
quiz and receive the higher of your
two scores
Option 2: Retake the quiz and receive
the average of your two scores
Questions about homework or
quizzes?
Room 308
Tuesday 3:10
Thursday 3:10
Question 6 (2 points)
• Incident ray hits the
•
•
mirror
Reflected ray is the
ray that bounces off
The Normal is the
perpendicular line
from mirror
Question 7 (3 points)
Actual path
Object
Apparent path
Activity pg 24-28
Due on Wednesday / Thursday
Will be graded
Ignore /skip question 3 on page 27
Pg 25
Your ray diagram should look something
like this:
Pg 25
1. What is the orientation of the rays
after being reflected from the mirrors
surface?
The reflected rays diverge.
The rays will never intersect (cross)
because they are diverging
Pg 25
2. How does the focal length compare to
the center of curvature?
The focal length is ½ the center of
curvature
Pg 26
3. If you had a 10 cm
Christmas tree bulb that was
10 cm in diameter, what
would it’s focal length be?
The focal length is ½ the center of
curvature = 5 cm
Pg 27
Your ray diagram should look something
like this:
Question 5, pg 28
Draw tangent lines
Do Now: Solve for x
1.
X
=
2
1. x/6 = 1/3
2. X+=1/4
6
2. x/8 = 1/2
do +o d+i 1/di
3. x/(do3.di X)== 1/d
4. 1/x
= =1/d
4. X
doodi+/ 1/d
(do+i di)
Vocab
Real Image
Word
Picture that reminds you of definition
Occur when light rays
from an object reflect
from a mirror and
converge
•
Definition
Word or words that remind you of definition
•
Image in front of
mirror
Only created by
concave mirrors
Sentence using word
Movie theatre projectors create real images
on the big screen.
Vocab
Virtual
Image
Word
Occur when light rays
from an object reflect
off a mirror and diverge
Definition
image
object
2.0 m
2.0 m
Picture that reminds you of definition
•
Virtual images are
behind the mirror
Word or words that remind you of definition
Sentence using word
My reflection in a plane mirror is a virtual
image because the reflected rays converge
behind the mirror
Lab 2!
How do you calculate the focal
length of a curved mirror?
1/f =1/do +1/di
1/Focal length =
1/object distance + 1/image distance
f = dodi / (do + di)
Note
Ignore question 2 on page 37
Ignore the bottom row discussing
convex mirror data on page 38
We will talk about convex mirrors
in class on Friday
Your data table
Image Size; either larger, smaller, or
same.
Image Orientation; either upright or
inverted.
Image Position; either behind mirror
(distance will be negative), between
mirror and object, at object, or beyond
object
Advice
Mark & number all 11 object and image
distances on your paper
Record the object size, orientation &
location of each image (skip recording the
object and image distances, you can measure those
later)
Advice
Group Roles
• 1 person measure the object and image
distances
• 1 person calculate the focal point
• Remaining group members should do
part 2 of the lab
What is f?
f = the focal length
What
C = is
theC?
center of Curvature
= C/2
What is thef relationship
The
focal
length
is
½
of
the
center
of
between f and C?
curvature
What is the image distance?
di= distance
paper
to mirror
What
is thefrom
object
distance?
do = distance from light filament to mirror
Curved Mirrors
Daily Work Organizer
Friday
Question of the Day: How can you find an
image location without looking into a mirror?
Do Now:
Answer the problems on pg 18-19
Agenda:
Cornell notes (3-6)
Mirror ray diagrams
Discuss lab results
Homework
Monday’s Homework:
Finish 30-33
Reading log: 39 - 40
Pg 37
Convex mirror
Position:
Size: Larger / Smaller / Same
Orientation: Upright / Inverted
Type: Real / Virtual
Convex
mirror
pg 37
Position: Behind the mirror
Size: Larger / Smaller
Smaller / Same
Upright / Inverted
Orientation: Upright
Virtual
Type: Real / Virtual
Convex mirror
Curved Mirror Vocab
 C = center of curvature
 radius of curvature
 f = focal point - rays converge
 F = focal length
f=C/2
C
f
Real vs Virtual Images
Concave Mirror
Image in front
Image is Real
Light rays converge
Use a Card
Real vs. Virtual Images
Concave Mirror
Image behind
mirror
Image is virtual
Appears to
converge
Concave Mirrors
Incoming Parallel rays reflect:
through the focal point!
C
f
Concave Mirrors
Rays through (or from) f reflect:
parallel!
C
f
Concave Mirrors
Rays through C reflect:
back through C!
C
f
Convex Mirrors
Incoming parallel rays reflect:
away from focal point!
C
f
Convex Mirrors
Rays towards focal point reflect:
parallel!
C
f
Note: Only the red lines are used to locate the image
Convex Mirrors
Rays towards C reflect:
back away from C!
C
f
Image Location
Choose easiest paths
Parallel
Focal Point
(Only need 2)
C “check”
image
Finding the Image
Draw ray paths
Identify Characteristics
Beyond C
larger
inverted
Real




R = Region
S = Size
O = Orientation
T = Type of Image
Now Go Make Your Own!
Pages 30-33
Daily Work Organizer
Friday
Question of the Day:
Do Now:
Agenda:
Homework
Tuesday’s Homework:
Finish 30-33
Problems: 43-44
Homework
Due Tuesday
Every Scholar:
Ray Diagrams (p. 30-33)
Due Wednesday
Problems (p. 43 – 47)
Due Friday
Cornell notes
Signed progress report
Physics text in binder
Extra Credit:
Answers pg 31




R = Region
S = Size
O = Orientation
T = Type of Image
Image Characteristics
Concave and Convex
Concave:
Object at center of Curvature
Concave
Object between C and F
Concave
Object between F and Mirror
Mirror Equations
Solving for f
1 1 1
= +
f do d i
fdo
di =
do - f
do di
f=
do + di
fdi
do =
di - f
Mirror Equations
Magnification
Really 3 different equations
di
hi
=
M=
do
ho
Mirror Equations
Image
Distance
Positive
negative
Focal
Length
In front of
mirror
Concave
mirrors
Behind mirror
Convex
mirrors
Let’s try some examples!
1.1 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
a. Find the focal length of the mirror
Let’s go over how to approach word problems…
Solving Word Problems
1. List your given information
(numbers you can use in eqns)
make sure to label them with a variable
sometimes this includes a picture
1.1 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
a.
Find the focal length of the mirror
Given:
f
do = 27cm
di = -65cm
f=?
Solving Word Problems
2. Write out the equation you will use
write it the way you will use it
1.1 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
a.
Find the focal length of the mirror
Given:
do = 27cm
di = -65cm
f=?
do di
f=
do+di
Solving Word Problems
3. Plug your numbers into the equation
Do not forget your units!
1.1 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
a.
Find the focal length of the mirror
Given:
dd
do = 27cm
di = -65cm
f=?
f =
o i
do + d i
(27cm)(-65cm)
f =
(27cm) + (-65cm)
Solving Word Problems
4. Calculate and write your answer!
Box it!
1.5 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
a.
Find the focal length of the mirror
Given:
dd
do = 27cm
di = -65cm
f =
o i
do + d i
(27cm)(-65cm)
f =
(27cm) + (-65cm)
f = 46cm
1.5 A girl is using a concave makeup
mirror to get ready for the prom and is
27 cm in front of the mirror. The image
is 65 cm behind the mirror.
b.
Find the Magnification of her image.
Given:
do = 27cm
di
M=
do
di = -65cm
(-65cm)
M=
(27cm)
M = 2.4
1.2 You are 2.0 m tall and stand 1.5 m in
front of a mirror. You see an image of
yourself that is upright and half your size.
a.
What type of image is it? Why?
Answer:
Image is virtual.
Why? Because image is
upright.
1.2 You are 2.0 m tall and stand 1.5 m in
front of a mirror. You see an image of
yourself that is upright and half your size.
b.
What type of mirror is it? Why?
Answer:
Mirror is convex.
Why? Because image is
smaller and virtual.
1.2 You are 2.0 m tall and stand 1.5 m in
front of a mirror. You see an image of
yourself that is upright and half your size.
c.
Find the center of curvature
1st, find di
Given:
ho =2.0m
hi =1.0m
do =1.5m
C =?
(1.5m)(1.0m)
di =
2.0m
di = .75m
di
hi
=
d o ho
do hi
di =
di = -.75m
ho
virtual!
1.2 You are 2.0 m tall and stand 1.5 m in
front of a mirror. You see an image of
yourself that is upright and half your size.
c. Find the center of curvature
solve for f
Given:
di = -.75m
do =1.5m
C =?
do d i
f =
do + d i
(1.5m)(-.75m)
f =
(1.5m) + (-.75m)
f = -1.5m
1.2 You are 2.0 m tall and stand 1.5 m in
front of a mirror. You see an image of
yourself that is upright and half your size.
c. Find the center of curvature
solve for C
Given:
f = -1.5m
C =?
C=2f
C = 2(-1.5m)
C = -3.0m
1.3 A convex mirror has a center of
curvature of 68 cm. If the image is located
22 cm from the mirror, where is the
object?
Given:
C = -68m
C
f =
2
f = -34cm
di = -22cm
di f
do =
di - f
(-22cm)(-34cm)
do =
(-22cm) - (-34cm)
do = 62cm
Daily Work Organizer
Tuesday
Question of the Day:
Do Now:
Answer problems 2-5 on pg 41
W/R Homework:
Agenda:
Finish p. 43-47
Homework
Extra Credit:
Honors problems
12, 13, 14
Answers
1.
2.
3.
4.
5.
C
A
C
D
D
Homework
Due Wednesday / Thursday
Problems (pg. 43 – 47)
Honors problems: #12-14
Due Friday
Cornell notes
Signed progress report
Physics text in binder
Extra Credit:
Honors
problems 12,
13, 14
On pg 46
Pg 43-47 Each question is
worth 3 points…
1 point for writing the given information
on the left hand side and an equation
you could use to solve the problem
1 point for the correct answer
1 point for a boxed answer
Extra Credit:
Honors
problems 12,
13, 14
Cornell Notes
1/3 for completeness
1/3 for notes and questions in margins
1/3 for summaries
Use your ray diagrams on
page 30-33 to fill out the
table on pg. 38
concave
Type of Object
mirror position Position
Image
Relative
Size
Orientation
Type
Same
Inverted
Real
Mirror to
focus
Center of At C
Curvature
Daily Work Organizer
Tuesday
Question of the Day:
Do Now:
Answer problems 6-10 on pg 42
(you can use your table on pg 38)
Friday Homework:
Finish
all
cornell
notes
Agenda:
Homework
Extra Credit:
Finish 43-47
Honors problems Signed Progress Report
12, 13, 14
PHYSICS TEXT!
Answers
6. E
7. A
8. C
9. B
10. E
Vocab
+
Convex
Word
A surface that curves
like the outside
(exterior) of a sphere
Definition
object
f
Picture that reminds you of definition
•
•
•
Outside of a sphere
Convex mirrors have
negative focal points
- f and - C
Word or words that remind you of definition
Sentence using word
Convex mirrors only produce virtual images.
The image is always behind the mirror.
Vocab
+
Concave
object
-
f
Word
Picture that reminds you of definition
A surface that curves
inwards like the inside
•
•
•
Definition
Word or words that remind you of definition
of a sphere
Cave
Inside of a sphere
+ f and + C
Sentence using word
If it rains, you could stand under a concave
mirror to keep dry. If you stood between the
mirror and focal point your image would be
Concave Mirrors
Object beyond C
Object between f and C
Image type:
Image type:
object
object
Image
f
C
f
C
Image
Object between f and the mirror
Object at C
Image type:
Image type:
object
C
object
f
f
C
Image
Image
The focal length is positive for concave mirrors
+
The Center of curvature is positive
for concave mirrors
f
Convex Mirrors
Object anywhere
Image type:
object
Image
f
The focal length is
negative for convex
mirrors
notes
C
-
+
f
C
The object distance is always positive because the object
cannot go behind the mirror
Convex only produce virtual images
Stations!
Station 8
• Pink book card
• Ray diagrams (pg. 30-33)
• Daily Work Organizer
Corrections to Practice
Problems
A.)
di = 22.3 cm
hi = 1.95 cm
Stations!
Station
Station
Station
Station
Station
Station
Station
Station
1:
2:
3:
4:
5:
6:
7:
8:
Spoons…
Gazing Globe
Make-up mirror…
Concave Mirror…
Dark Box
Practice problems
Real vs. virtual images
pg 30-33 + DWO