# Ray Optics-Reflection and Refraction of Light (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 21 - 24 of 24

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## Question number: 21

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

MCQ▾

### Question

Two plane mirrors are placed at an angle a so that a ray parallel to one mirror gets reflected parallel to the second mirror after two consecutive reflections. The value of a will be

### Choices

Choice (4) Response

a.

30°

b.

60°

c.

75°

d.

90°

## Question number: 22

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

MCQ▾

### Question

Two plane mirrors are inclined at an angle of 30°. Then the first four images of an object O placed between the two mirrors are correctly represented by

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 23

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

Appeared in Year: 2016

MCQ▾

### Question

An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is –

### Choices

Choice (4) Response

a.

12

b.

10

c.

8

d.

16

## Question number: 24

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

Appeared in Year: 2017

MCQ▾

### Question

A beam of light from a source is incident normally on a plane mirror fixed at a certain distance from the source. The beam is reflected back as a spot on a scale placed just above the source . When the mirror is rotated through a small angle , the spot of the light is found to move through a distance on the scale. The angle∴ is given by –

### Choices

Choice (4) Response

a.

b.

c.

d.