Worksheet 5
LIGHT
Select and write the most appropriate
alternative [A,B,C,D] from those given below each statement.
1.
The angle of reflection is the angle between
The angle of reflection is the angle between
A] The incident ray and the normal
B] The incident ray and the
reflecting surface
C] The incident ray and the reflected
ray
D] The reflected ray and the normal
2.
The angle between the incident ray and the reflected ray is 40°.Therefore
the angle of incidence is
The angle between the incident ray and the reflected ray is 40°.Therefore
the angle of incidence is
A] 40° B] 80°
C] 90°
D] 20°
3.
A coin is kept between two mirrors kept vertically at an angle of 60°.
The number of images of the coin, that will be seen, are
A coin is kept between two mirrors kept vertically at an angle of 60°.
The number of images of the coin, that will be seen, are
A] 1
B] 2
C] 4 D] 5
4.
The amount of light that enters the eye is controlled by
The amount of light that enters the eye is controlled by
A] Cornea
B] Retina
C] Iris
D] Eye lens
5.
The impression of the image formed on the retina
The impression of the image formed on the retina
A] Persists for 1 second
B] Persists for 16 seconds
C] Persists for 1/16th of
a second
D] Does not persist at all
6.
Cataract is caused due to a defect in
Cataract is caused due to a defect in
A] Eye lens
B] Retina
C] Cornea D] Optical
nerve
7.
Many eye troubles are caused due to lack of
Many eye troubles are caused due to lack of
A] Vitamin A
B] Vitamin B
C] Vitamin C
D] Vitamin D
8.
When a visually challenged person uses the Braille system, he uses his
When a visually challenged person uses the Braille system, he uses his
A] Sense of vision B] Sense
of touch
C] Sense of taste C]
Sense of smell
9.
Night blindness is caused due to lack of
Night blindness is caused due to lack of
A] Vitamin A
B] Vitamin B
C] Vitamin C
C] Vitamin C
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