Nanyang Technological University
QCP 521 Teaching of Physics II
Lesson Plan and Microteaching
Topic: Reflection of Light
Name
:
NRIC No.
:
Matriculation No. :
Tutor
:
Class
:
Koh Chung Kiat
S7828882E
054556D23
Dr K.C. Yap
LG01/TG01
QCP 521
Reflection of Light Lesson Plan
Topic: Reflection of Light
Duration: Double Period (70 minutes)
Students’ Abilities: Mixed Ability
Location: Physics Laboratory
Level: Secondary 3 Express Students (Pure Physics)
Students’ Prior Knowledge and Skills:
Students should be able to:
1.
state the properties of light
2.
explain how reflection is different for smooth and rough surfaces
3.
state the characteristics of the image formed by the plane mirror
Objectives of the lesson:
At the end of the lesson, students should be able to:
1.
identify the normal, angle of incidence and angle of reflection, which
are used in the concept of reflection of light
2.
state the laws of reflection
3.
construct ray diagrams to illustrate the formation of images of an object
by a plane mirror
IT Resources: Applet and OHT
Non IT Resources: Worksheet
Equipment Used in Induction & Activity:
Full Length Mirror, Cardboard Arrows, Ruler, Protractor, Small Plane Mirror, Pins,
Plain Paper & Soft Board.
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QCP 521
Reflection of Light Lesson Plan
Analysis of Main Concepts and Structure of Knowledge:
Light
Reflection of Smooth and
Rough Surfaces
Properties of Light
Characteristics of Images
Formed by Plane Mirror
How Light Travels From
Object to Mirror to Eye
Laws of Reflection
Normal, Angle of
Incidence and Reflection
Construction of Light
Ray Diagrams
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QCP 521
Reflection of Light Lesson Plan
Teaching/Learning Activities
Duration
5 min
Activities



Teacher is to ask students to
Resources

Worksheet
Rationale

This is to help students
state the properties of light.
recap their prior
Teacher is to ask students how
knowledge on light,
reflection is different for smooth
reflection, which will be
and rough surfaces.
applied in the session.

Teacher is to provide the lesson
Lesson objectives are
provided to allow
objectives to the students.
students to know what
to expect during the
lesson.
10 min
Set Induction:



Full length

By showing the
Teacher is to use the 2 examples
mirror or
negative examples,
of light ray diagrams that are
normal
teacher would
wrongly drawn to spark the
mirror
encourage students to
thinking process of the students.

Worksheet
use their prior
Teacher is to ask a few students

Cardboard
knowledge to analyse
arrows
the errors in the ray
to stand in front of a full length
mirror or normal mirror and
diagrams, which would
deduce the path of the light ray
spark their interest in
from an object to the eye.
the following activity.

This is to encourage
students to think about
the path of a light ray
when they see an
image in the mirror
before conducting the
activity, so that they
would appreciate the
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QCP 521
Reflection of Light Lesson Plan
Duration
Activities
Resources
Rationale
purpose of this
session.
20 min
Activity to study reflection of light


Teacher is to explain the
Equipment
pairs so as to help one
procedure of conducting the
required:
another in times of
activity to the students, and to

Ruler
difficulty. Also,
remind students what they are

Protractor
students can apply
supposed to find.

Small plane
cooperative learning in
mirror
this session.


Students are to work in pairs for
Worksheet


The work is done in
this activity and will collect 1 set

Pins
of equipment per pair from the

Plain paper
move around to ensure
teacher’s table.

Soft board
that students are on
Teacher needs to
Teacher is to move around the
task as well as
laboratory to assist students in
checking on their
completing the activity.
measurement and
experimental skills.
5 min

Teacher is to ask a few students

OHT 1

The purpose of asking
to identify and explain the
students these
following terms from a ray
questions is to assess
diagram:
the students’
 Normal
understanding of the
 Angle of incidence
activity, and to
 Angle of reflection
reinforce the students’
concept of the terms
used in reflection of
light.
5 min

Teacher is to ask students to

Worksheet

This is to help students
state and explain the
recap their prior
characteristics of images formed
knowledge on
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QCP 521
Duration
Reflection of Light Lesson Plan
Activities
Resources
Rationale
by the plane mirror.
characteristics of
images formed by a
plane mirror, which will
be used later.
20 min


Teacher is to show students the

Applet
The applet is an easy
applet on reflection of light to
tool to allow students
induce the laws of reflection and
to observe the laws of
to show students the position of
reflection and the
an image formed by a plane
position of the image
mirror.
formed by the plane
Teacher is to draw diagrams on
mirror.

the applet to show students how


By allowing a hands-
an image would look like when
on session for the
an object is placed in front of a
students to use the
mirror.
applet, they are able to
Students who would like to try
reinforce their
using the applet can do so under
concepts of this topic.
the guidance of the teacher while
the rest of the students complete
their worksheets.
5 min
Lesson Closure

Worksheet

This is done so as to
Teacher is to sum up the
reinforce the concepts
concepts that the students have
learnt in this session
discovered and the laws of



The worksheet is used
reflection.
to assess the students’
Students are required to
knowledge and their
complete the worksheet and
understanding of the
hand in the worksheet to the
topic.
teacher at the end of the session.
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QCP 521
Reflection of Light Lesson Plan
REFLECTION OF LIGHT WORKSHEET
Name: ________________________
Date: _______________
Class: 3/___
What you will be learning today:
1.
Identify the normal, angle of incidence and angle of reflection,
which are terms used in the concept of reflection of light
2.
State the laws of reflection
3.
Construct ray diagrams to illustrate the formation of images of
an object by a plane mirror
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Revision: What are the properties of light?
________________________________________________________________
________________________________________________________________
Revision: How is reflection of light different for smooth and rough surfaces?
________________________________________________________________
________________________________________________________________
What is wrong with the following light ray diagrams?
__________________________
__________________________
__________________________
__________________________
__________________________
__________________________
How does light ray from your hand reflect from the mirror and reach your eye?
________________________________________________________________
________________________________________________________________
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QCP 521
Reflection of Light Lesson Plan
Activity:
The following activity will be carried out in pairs. Follow the instructions provided
at the back of this worksheet. You and your partner will be required to complete
the following table and answer the questions below.
What is the normal?
________________________________________________________________
________________________________________________________________
What is the angle of incidence?
________________________________________________________________
________________________________________________________________
What is the angle of reflection?
________________________________________________________________
________________________________________________________________
Experiment
Set No.
Angle of
Incidence
Angle of
Reflection
Remarks
What can you observe from this experiment?
________________________________________________________________
________________________________________________________________
Revision: What are the characteristics of images formed by plane mirrors?
________________________________________________________________
________________________________________________________________
State the laws of reflection.
________________________________________________________________
________________________________________________________________
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QCP 521
Reflection of Light Lesson Plan
Complete the ray diagram by labelling the normal, angle of incidence and angle
of reflection.
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QCP 521
Reflection of Light Lesson Plan
Instructions for Activity to Study Reflection of Light
1. Collect 1 set of the following equipment from the teacher’s table.

Ruler

Protractor

2 pieces of plain paper

4 pins

Small plane mirror

Soft board
2. Place a piece of paper above the soft board. Draw a horizontal line across
the paper. The mirror will be placed upright along the line. Draw another
line which is perpendicular to the first line. This line represents the normal
to the plane mirror. Label the point of intersection of the normal and the
mirror as point N.
3. Now, draw a line NA in such a way that line NA is making a 45 with the
mirror.
4. Place the mirror along the horizontal line. Insert 2 pins, P1 and P2 on the
line NA. When your eye is in level with the pins and the mirror, you should
be able to see the images of the pin the mirror on the other side of the
normal.
5. Insert another pin, P3, on the other side of the normal such that it is in line
with the images of P1 and P2.
6. Insert another pin, P4, on the other side of the normal such that it is in line
with pin P3 and the images of P1 and P2.
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QCP 521
Reflection of Light Lesson Plan
7. Remove the mirror and the pins. Draw a line from point N passing through
the points P3 and P4, extending to point B.
8. The angle of incidence of a light ray is the angle that the incident light rays
from the pins P1 and P2 make with the normal. The incident light ray is
represented by the line NA. Measure this angle and record it in the
worksheet provided.
9. The angle of reflection of a light ray is the angle that the reflected light
rays make with the normal. The reflected light ray is represented by the
line NB. Measure this angle and record it in the worksheet provided.
10. Repeat steps 2 to 9 using a different angle to the mirror and label the lines
NA’ and NB’. Record your readings and observations on the worksheet.
11. Using a new sheet of paper, repeat the entire activity using different
angles. There should be 2 sets of light rays on each sheet of paper.
12. Before submitting the worksheet at the end of the lesson, each student
should attach one sheet of paper with the completed light rays to the back
of the worksheet.
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QCP 521
Reflection of Light Lesson Plan
OHT 1
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QCP 521
Reflection of Light Lesson Plan
Reflection of Light Applet
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QCP 521
Reflection of Light Lesson Plan
References:
GCE ‘O’ Level Syllabus: http://www.seab.gov.sg/
Lower Secondary Science Syllabus: http://www.moe.gov.sg/cpdd/syllabuses.htm
http://www.phy.ntnu.edu.tw/oldjava/optics/mirror_e.html
http://www.physicsclassroom.com/Class/refln/reflntoc.html
Tan, O. S., Parsons, R. D., Hinson, S. L., & Sandro-Brown, D. (2003)
Educational Psychology: A Practitioner-Researcher Approach. An Asian
Edition (pp. 81-87). Singapore: Thomson.
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