Optics
Friday, March 6, 2015
Unit 8: EM Spectrum/Optics
Friday, 3/6

Pick up a sheet of paper (do not write on it…it’s for later)

Draw the diagrams below and label the mirrors below (concave,
convex).
Upcoming dates:




Monday, 3/9 – Spring break starts
Thursday, 3/19 – tentative date for EM Spectrum/Optics test
Thursday, 4/2 – 5SW extra credit due by 4:30
Friday, 4/10 – End of 5SW
Warm-up answer
Quiz
 Phones
need to be in your bag or on my
desk.
 Take out your notes for the quiz.
 You will have fifteen minutes to complete
the quiz. When you are finished


Turn your quiz over
Find something quiet to do (no phones out)
until everyone is done.
Introduction to lenses
 On
the back table you will find two different
shaped lenses.



Place the lenses in front of the light source and
observe what the light ray does.
You will trace the the incoming and outgoing
(show me your rays before tracing).
Trace the rays on the paper provided (we will be
adding notes to your diagrams.
Convex Lens
Concave Lens
Synthesizing what we know
 For
three minutes you will write about the how
light rays behave (reflection and refraction) and
what role the shape of lenses have on the
direction of the outgoing light ray.
Ray Diagrams
 Diagraming
the light rays from an object allow
us to predict the image we see.




Location of the image
Real or virtual
Orientation; erect or inverted
Size; enlarged, same size, reduced)
 We
will do this for convex lenses only!
Setting up the principal axis
Rules for Drawing Ray
Diagrams
Note: the point where the lines intersect is the image location.
Darken in that point (point becomes the tip of the arrow)
Example 1
Example 2
Example 3
Example 4
Example 5