
Ray Model of Light (Law of Reflection)
Presentation
•
Physics
•
8th Grade
•
Medium
Standards-aligned
Jie Seow
Used 15+ times
FREE Resource
17 Slides • 18 Questions
1
Ray Model of Light (Law of Reflection)
How do light rays behave when they undergo reflection?
2
Let's learn some important terms first!
What is the normal line?
What is the incident ray?
What is the reflected ray?
Where is the angle of incidence?
Where is the angle of reflection?
3
4
Multiple Choice
The normal should be drawn using a __________ line.
solid
dotted
5
Multiple Choice
The normal is ___________ to the surface.
perpendicular
parallel
6
7
8
Multiple Choice
Which is the ray what strikes the surface?
Incident ray
Incidence ray
Reflected ray
Reflection ray
9
Multiple Choice
Which is the ray that is reflected off the surface?
Incident ray
Incidence ray
Reflected ray
Reflection ray
10
11
Fill in the Blanks
Type answer...
12
Fill in the Blanks
Type answer...
13
Law of Reflection
The angle of incidence is equal to the angle of reflection (i = r)
The incident ray, the reflected ray and the normal at the point of incidence all lie on the same plane.
14
Multiple Choice
What does the Law of Reflection state?
The angle of incidence is larger than the angle of reflection.
The angle of incidence is equal to the angle of reflection.
The angle of incidence is smaller than the angle of reflection.
15
Multiple Choice
16
Multiple Choice
In the diagram, which letter represents the angle of incidence?
B
C
D
E
17
Multiple Choice
What is the line MN called in the given diagram
incident ray
reflected ray
reflecting surface
normal
18
Multiple Choice
The ray that bounces off the mirror.
Angle of Reflection
Incident Ray
Reflected Ray
Angle of Reflection
19
Multiple Choice
The ray of light that strikes a mirror.
Reflected Ray
Incident Ray
Angle of Incidence
Angle of Reflection
20
Multiple Choice
Zoom in to see question.
A
B
C
D
21
Multiple Choice
If the angle of reflection is 35 degrees, what is the angle of incidence?
35
55
90
0
22
Fill in the Blanks
Type answer...
23
Multiple Choice
In the given figure, which of the following is TRUE?
The angle of incidence is 10°.
The angle of incidence is 80°.
The angle of reflection is 10°.
The angle of reflection is 90°.
24
What happens when the reflecting surface is rough?
25
26
Smooth Surface
Regular Reflection
All light rays are reflected in the same direction
Clear images are formed
27
Rough Surface
Irregular / Diffused Reflection
All light rays are reflected in different directions
No image is formed
28
29
Multiple Choice
In which type of reflection will we be able to see an image?
regular
diffused
30
Multiple Choice
Which is a rough surface?
mirror
glass
still water
silk
31
Activity Book (1B)
Page 24, question 3
32
Draw this working in your diagram on Page 24
33
34
35
Complete Page 21, 22 and 23 of your activity book for homework
Ray Model of Light (Law of Reflection)
How do light rays behave when they undergo reflection?
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