Ray Optics Test

Result

Ray Optics Test - 5

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

Which of the following relation is called minor equation?

A
u/v + f/u = 1/f

B
1/v + 1/u = 1/f

C
1/f + u = 1/v

D
uf + vf = uv
Question 2
4 / -1

Where should a person stand straight from the pole of a convex mirror of focal length 2.0 m on its axis, so that the image formed become half of his original height?

A
– 2.60 m

B
– 4.0 m

C
– 5.0 m

D
– 2.0 m

Solution
Question 3
4 / -1

A ray of light is incident on a plane mirror at an angle of 60°. The angle of deviation produced by the mirror is

A
120°

B
30°

C
60°

D
90°

Solution
Question 4
4 / -1

A plane mirror produces a magnification of

A
–1

B
+1

C
zero

D
infinite
Question 5
4 / -1

Two plane mirrors arc inclined at an angle θ. It is found that a ray incident on one mirror at any angle is rendered parallel to itself after reflection from both the mirrors. The value of θ is

A
30°

B
60°

C
90°

D
120°

Solution
Question 6
4 / -1

Two plane mirrors inclined to each other at an angle 72°, what is the number of image formed?

A
3

B
5

C
9

D
7

Solution
Question 7
4 / -1

A real object is placed at a distance f from the pole of a convex mirror, in front of the convex mirror. If focal length of the mirror is f, then distance of the image from the pole of the mirror is

A
2f

B
f /2

C
4f

D
f /4
Question 8
4 / -1

Two plane mirrors are perpendicular to each other. A ray after suffering reflection from the two mirrors will be

A
perpendicular to the original ray

B
parallel to the original ray

C
parallel to the first mirror

D
at 45° to the original ray
Question 9
4 / -1

To get three images of a single object, one should have two plane mirrors at an angle of

A
60°

B
90°

C
120°

D
30°
Question 10
4 / -1

The magnification of the image when an object is placed at a distance x from the principal focus of a mirror of focal length f is

A

B

C

D