Light UPSC Questions

Physics

Light MCQ Questions


7.
Match the following
List I List II
a) Opaque 1.) Water
b) Transparent 2.) Sun
c) Translucent 3.) Wood
d) Luminous 4.) Some plastics
A.
a-1,b-2,c-3,d-4
B.
a-3,b-1,c-4,d-2
C.
a-4,b-3,c-2,d-1
D.
a-2,b-1,c-3,d-4
😑 View Answer Rough Work Error
ANSWER :
B. a-3,b-1,c-4,d-2
8.
A mirror forms a virtual image of a real object because it must be a
A.
It must be a convex mirror
B.
It must be a concave mirror
C.
It must be a plane mirror
D.
It may be plane or convex mirror
😑 View Answer Rough Work Error
ANSWER :
D. It may be plane or convex mirror
9.
A new optical disc format known as the Blu-ray Disc BD is becoming popular. In what way is it different from the traditional DVD?
1. DVD supports Standard Definition video while BD supports High Definition video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. The thickness of BD is 2.4 mm while that of DVD is 1.2 mm.
Which of the statements given above is /are correct?
UPSC - 2011
A.
1 only
B.
1 and 2 only
C.
2 and 3 only
D.
1,2 and 3
😑 View Answer Rough Work Error
ANSWER :
B. 1 and 2 only
10.
The angle of incidence is equal to the angle of reflection is known as
A.
Law of reflection
B.
Law of refracton
C.
Law of retardation
D.
None of the above
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ANSWER :
A. Law of reflection
11.
When the light is incident on the smooth, polished surface is called
A.
Diffused reflection
B.
Irregular reflection
C.
Regular reflection
D.
None of the above
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ANSWER :
C. Regular reflection
12.
Visually impaired persons can read and write using
A.
Braille system
B.
Digital pens
C.
Earing Aids
D.
Electronic writer
😑 View Answer Rough Work Error
ANSWER :
A. Braille system