TABLE OF CONTENT
Concept Map of Light
1
Teaching Overview
2
Development of Lesson
3
Worksheet
7
Materials
9
PowerPoint Slide
11
Concept
Map
of
Light
Light Speed is:
Represented by:
300 000 000
Rays
Reflects
Law of reflection 1. The incident ray, reflected ray and the normal at the point of incidence, all lie on the
Refracted
Properties of plane mirror ima e are 1. Image same size as
Law states:
In a prism:
Wave bends towards the normal in the slower
Waves are dispersed in to a spectrum.
2. Image is upright.
2. Angle of incidence = angle of reflection
3. Virtual
Caused by
4. Laterally inverted
Change in wave speed
5. As far away from the plane of reflection as the
2
TEACHING OVERVIEW
Subject Date and Day Class / Form Title / Theme Time Learning Objective Learning Outcome
: : : : : : :
Physics Form 4 16 July 2008 Form 4A Light 9.00- 9.40 am (40 minutes) Understanding reflection of light At the end of the lesson, students should be able to: 1. Describe the characteristics of images formed by plane
mirror under reflection of light 2. State the laws of reflection of light Prior Knowledge and Skills
: Students have ideas about images formed by mirrors and
that light travels in straight line.
Scientific Skills
: Observing, classifying, inferring and predicting.
Thinking Skills
: Attributing, comparing and contrasting, classifying.
Moral and Scientific
: 1. Having an interest and curiosity towards the environment. 2. Having critical and analytical thinking. 3. Being flexible and open-minded.
Value
TEACHING OVERVIEW
Subject Date and Day Class / Form Title / Theme Time Learning Objective Learning Outcome
: : : : : : :
Physics Form 4 16 July 2008 Form 4A Light 9.00- 9.40 am (40 minutes) Understanding reflection of light At the end of the lesson, students should be able to: 1. Describe the characteristics of images formed by plane
mirror under reflection of light 2. State the laws of reflection of light Prior Knowledge and Skills
: Students have ideas about images formed by mirrors and
that light travels in straight line.
Scientific Skills
: Observing, classifying, inferring and predicting.
Thinking Skills
: Attributing, comparing and contrasting, classifying.
Moral and Scientific
: 1. Having an interest and curiosity towards the environment. 2. Having critical and analytical thinking. 3. Being flexible and open-minded.
Value Materials
: 1. Physics Form 4 Textbook 2. Reflection of light worksheet 3. Video clip of introduction 4. Vid Video eo clip of image i mage of plane mirror
Teaching Aid
: LCD, laptop, white board and worksheet.
Preparation`
: 1. Instruct students to read text book as a preparation from
page 40 to 41 before entering the class. 2. Review the reflection video clips, textbook and or other related teaching aids. 3. Prepare activity sheet for the lesson
3
DEVELOPMENT OF LESSON
Peda Pedagog gogy y
: Class Classro room om disc discus ussi sion on with with LCD LCD pres presen enta tati tion on
Learning Activities Introduction
Content Based on the video clip of introduction,
(5 minutes)
(i) Light streaming into a dusty space in the evening.
Observe situations
(ii) Shadows of object are formed.
that relate shadows
The forming of shadows is due to the fact that light
traveling in straight lines and how we can make use of
and how light travels.
travels in straight lines.
this fact to trace the path of light in reflection and in so
•
T&L Strategies / Methods Recall what students have learnt about propagation of
light. •
Tell Tell students that they are going to learn about light
Writing observations
doing we are able to describe the characteristics of the
on work sheet.
images. Work sheet is given out to students. •
View video clip:
(i) Light streaming into a dusty space in the evening. (ii) Shadows of object are formed. •
Guide students to make an inference from what they see from the video clip and facilitate them to write their observations on work sheet.
Scientific Skills: Observing, inferring, predicting
4
Development 1
(i) (i)
Intr Introdu oduce ce the the ter terms ms used used in refl reflec ecti tion on such such
(10 - 15 minutes)
as the normal, incident ray, reflected ray, ray,
Hands-on activity.
angle of incidence and angle of reflection. (ii) ii)
Answer questions in
•
doing ‘hands-on’ activity about the laws of reflection. •
The law laws of of re reflect lectio ion: n: •
work sheet.
The incident ray, the reflected ray and
Introduce terms used in reflection by plane mirror by
From the activity, teacher facilitates and discusses with the students how to state the laws of reflection.
•
Students completing questions 2 and 3 on the work sheet.
the normal at the point of incidence, all lie on the same plane. •
Development 2
(i) (i)
The angle of incidence = the angle of
Materials: protractor, protractor, source of light and a plane.
reflection
Scientific Skills: Observing, inferring
Char Charac acte teri rist stic icss of imag imagee form formed ed by by plan planee
(10-15 minutes)
mirror:
Refer to video clip of
•
Virtual
•
Same size as object
•
Upright
•
Laterally inverted
•
As far far away away from from the the plan planee of
image of plane mirror Discuss the characteristics of
•
Students are asked observe the characteristics of image formed by plane mirror by watching video clip of image of plane mirror or mirror or hands-on activity. activity.
•
Students are asked to look at the clip and doing hands-on activity to describe the characteristics of image formed in the work sheet.
image formed by plane mirror.
reflection as the object
Scientific Skills: Observing, inferring and predicting.
5
Development 1
(i) (i)
Intr Introdu oduce ce the the ter terms ms used used in refl reflec ecti tion on such such
(10 - 15 minutes)
as the normal, incident ray, reflected ray, ray,
Hands-on activity.
angle of incidence and angle of reflection. (ii) ii)
Answer questions in
•
doing ‘hands-on’ activity about the laws of reflection. •
The law laws of of re reflect lectio ion: n: •
work sheet.
Introduce terms used in reflection by plane mirror by
From the activity, teacher facilitates and discusses with the students how to state the laws of reflection.
The incident ray, the reflected ray and
•
Students completing questions 2 and 3 on the work sheet.
the normal at the point of incidence, all lie on the same plane. •
Development 2
(i) (i)
The angle of incidence = the angle of
Materials: protractor, protractor, source of light and a plane.
reflection
Scientific Skills: Observing, inferring
Char Charac acte teri rist stic icss of imag imagee form formed ed by by plan planee
(10-15 minutes)
mirror:
Refer to video clip of
•
Virtual
•
Same size as object
•
Upright
•
Laterally inverted
•
As far far away away from from the the plan planee of
image of plane mirror Discuss the characteristics of
•
Students are asked observe the characteristics of image formed by plane mirror by watching video clip of image of plane mirror or mirror or hands-on activity. activity.
•
Students are asked to look at the clip and doing hands-on activity to describe the characteristics of image formed in the work sheet.
image formed by plane mirror.
Scientific Skills: Observing, inferring and predicting.
reflection as the object
5
Answer questions in work sheet.
(ii)
Drawing
of
ray
diagram
using
the
•
characteristics of the image formed by the
Teacher eacher guides the students students to draw the ray diagram based on the characteristics of image formed.
plane mirror. Scientific Skills: Classifying, inferring and predicting.
Moral and Scientific Value: • Having critical and analytical thinking. • Being flexible and open-minded.
Closure
Summary from work sheet.
(5 minutes)
(Go over the work sheet.)
Summarizing lesson. Assignment
•
Guide students to summarize the lesson by referring to their work sheet.
•
Give homework to students – 5.1 Questions (text book page 43)
Moral and Scientific Value: • Having an interest and curiosity towards the environment.
6
Answer questions in work sheet.
(ii)
Drawing
of
ray
diagram
using
the
•
characteristics of the image formed by the
Teacher eacher guides the students students to draw the ray diagram based on the characteristics of image formed.
plane mirror. Scientific Skills: Classifying, inferring and predicting.
Moral and Scientific Value: • Having critical and analytical thinking. • Being flexible and open-minded.
Closure
Summary from work sheet.
(5 minutes)
(Go over the work sheet.)
Summarizing lesson. Assignment
•
Guide students to summarize the lesson by referring to their work sheet.
•
Give homework to students – 5.1 Questions (text book page 43)
Moral and Scientific Value: • Having an interest and curiosity towards the environment.
6
Objective achievement:
At the end of teaching and learning, students are able to: 1. Describe the characteristics of images formed by reflection of light 2. State the laws of reflection of light in their own words. 3. Drawing of ray diagram using the characteristics of the image formed by the plane mirror.
7
Objective achievement:
At the end of teaching and learning, students are able to: 1. Describe the characteristics of images formed by reflection of light 2. State the laws of reflection of light in their own words. 3. Drawing of ray diagram using the characteristics of the image formed by the plane mirror.
7
WORKSHEET
1. ‘Shadows ‘Shadows are formed formed when when the path path of light light is obstructed obstructed.. The shape shape of the the shadow is similar to the shape of the object.’ What can you say about the propagation of light?
2.
Plane mirror
In the ray diagram shown above, label i. inci incid dent ent ray ray,, ii. ii. refl reflec ecte ted d ray ray, iii. normal, iv angl anglee of of inc incid iden ence, ce, i
WORKSHEET
1. ‘Shadows ‘Shadows are formed formed when when the path path of light light is obstructed obstructed.. The shape shape of the the shadow is similar to the shape of the object.’ What can you say about the propagation of light?
2.
Plane mirror
In the ray diagram shown above, label i. inci incid dent ent ray ray,, ii. ii. refl reflec ecte ted d ray ray, iii. normal, iv. iv. angl anglee of of inc incid iden ence, ce, i, v. angl anglee of of ref reflec lectio tion, n, r . 3. The The law lawss of of ref reflec lecti tion on:: i.
ii.
4. List the the five characteri characteristics stics of of the image image formed formed by a plane mirror. mirror. i. ii. iii. iv. iv. v.
8
5. Complete Complete the the ray diagrams diagrams in in the the followin following g examples examples:: i. An observ observer er looking looking at the image of a ball ball in the mirror mirror..
eye
Plane mirror
ii. An obser observer ver looki looking ng at the the image image of the moon moon..
eye
Plane mirror
iii.
An observ observer er looking looking at the image of the the letter F.
eye Plane mirror
9
MATERIALS
10
MATERIALS
11
POWER POINT SLIDES HANDOUT
12