Ray Optics Test

Result

Ray Optics Test - 51

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Weekly Quiz Competition

Question 1
4 / -1

A ray of light is incidenting normally on a plane mirror. The angle of reflection will be

A
0°

B
90°

C
Will not be reflected

D
None of these

Solution
Question 2
4 / -1

When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to

A
0

B
π/2

C
π

D
2π
Question 3
4 / -1

A ray is reflected in turn by three plane mirrors mutually at right angles to each other. The angle between the incident and the reflected rays is

A
90°

B
60°

C
180°

D
None of these
Question 4
4 / -1

Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand

A
None

B
1

C
2

D
3
Question 5
4 / -1

When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image

A
Is doubled

B
Is halved

C
Remains the same

D
Becomes infinite
Question 6
4 / -1

A plane mirror produces a magnification of

A
–1

B
+ 1

C
Zero

D
Between 0 and + ∞
Question 7
4 / -1

A plane mirror makes an angle of 30° with horizontal. If a vertical ray strikes the mirror, find the angle between mirror and reflected ray

A
30°

B
45°

C
60°

D
90°

Solution
Question 8
4 / -1

A ray of light is incident at 50° on the middle of one of the two mirrors arranged at an angle of 60° between them. The ray then touches the second mirror, gets reflected back to the first mirror, making an angle of incidence of

A
50°

B
60°

C
70°

D
80°

Solution
Question 9
4 / -1

A small object is placed 10 cm infront of a plane mirror. If you stand behind the object 30 cm from the mirror and look at its image, the distance focused for your eye will be

A
60 cm

B
20 cm

C
40 cm

D
80 cm

Solution
Question 10
4 / -1

A man runs towards a mirror at a speed 15 m/s. The speed of the image relative to the man is

A
15 ms^–1

B
30 ms^–1

C
35 ms^–1

D
20 ms^–1

Solution