Question

17. The instrument which works on the principle of reflection of light on plane mirrors
( )
A. telescope
B. iconoscope
C. kaleidoscope D. periscope
is ...
18. The right side of an object appears as left of the image. This is
called
A. lateral surface
B. lateral inversion C. internal reflection D. refraction
)
e
19. If two plane mirrors are kept at right angle the number of images formed
is
(
A. 4
B. 3
C. 5
D. many
)
20. If two plane mirrors are kept parallel to each other, the number of images
formed
(
A. 5
.B. 9
C. infinite
D. 12
D. shadow
C. mirror
21. We can see objects only when there is
A. darkness
B. light
22. The angle between the incident ray and the normal is called
A. angle8 of refraction
B. angle of reflection
C. angle of deviation
D. angle of incidence
.EE
D. many
23. The number of plane mirrors used in a periscope is
A. 3
B. 2
C. 4
24. The bulging portion of a polished metal spoon acts as
)
A. convex lens B. concave mirror C. concave lens D. convex mirror
​

Answer 1

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1. D. periscope
2. B Lateral inversion
3. B (3)
4. Infinite
5. light
6. angle of incidence
7. 2
8. convex lens

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