Question

(a) State the two laws of reflection of light.
(b) State two uses of a plane mirror.
(c) Write down the letter P and H as seen in a plane mirror.
(d) The leaves appear green when seen in white light. Give a reason.
(e) The following diagram shows an incident ray AO and the normal
ON on a plane mirror. Find the angle of incidence and angle of
reflection.
urs. Its
es throug
cellophar
hrough i
eer
m
light of
A
in
b
4
1
30°
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Answer 1

• Explanation:

The 2 laws of reflection of light are :

1. The incident ray

2. The reflected ray

The 2 uses of plane mirror are :

1. The periscopes

2. In kaleidoscopes to see round dangerous bends

The plane mirror words of P and H words Are :

P word is q

H word is H

The leaves appear green in white light because they reflect only the green light and absorb the light of all other colors.

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Answer 2

Answer

a)two laws of motion are :

1. the incident rat , the reflected ray and the normal to the reflection surface at the point of Incidence lie in the same plane .
2. the angle in which the incident ray make with the normal is equal to the angle which the reflected ray makes to the same normal

b) two use of plane mirror are :

1. they are used to make kaleidoscope

-they used in various scientific instrument.

c) p will show in plane mirror as it's opposite

and H will be shown as it is

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