# Ray Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 7 - 11 of 105

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## Question number: 7

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

### Question

A crown glass prism of angle 5° is to be combined with a flint glass prism in such a way that the mean ray passes undeviated. Find the angle of the flint glass prism needed and the angular dispersion produced by the combination when white light goes through it. Refractive indices for red, yellow and violet light are 1.514,1.517 and 1.523 respectively for crown glass and 1.613,1.620 and 1.632 for flint glass.

### Choices

Choice (4) Response

a.

4.2°, 0.0138°

b.

4.4°, 0.0218°

c.

1.2°, 0.0348°

d.

4.2°, 0.0348°

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## Passage

A plane mirror (M 1) and a concave mirror (M 2) of focal length 10 cm are arranged as shown in figure. An object is kept at origin. Answer the following questions. (Consider image formed by single reflection in all cases)

## Question number: 8 (1 of 2 Based on Passage) Show Passage

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

MCQ▾

### Question

The co-ordinates of image formed by concave mirror are

### Choices

Choice (4) Response

a.

(10 cm, -40 cm)

b.

(10 cm, 8 cm)

c.

(10 cm, - 60 cm)

d.

Question does not provide sufficient data or is vague

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## Question number: 9 (2 of 2 Based on Passage) Show Passage

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

MCQ▾

### Question

The co-ordinates of image formed by plane mirror are

### Choices

Choice (4) Response

a.

(-20 cm, 0)

b.

(10 cm, -10 cm)

c.

(10 cm, - 60 cm)

d.

(10 cm, 10 cm)

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## Question number: 10

» Ray Optics » Lens Maker's Formula and Lens Formula

MCQ▾

### Question

The focal length of the lens of the human eye is maximum when it is looking at an object at,

### Choices

Choice (4) Response

a.

Infinity

b.

Very near the eye.

c.

25 cm from the eye

d.

100 cm from the eye

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## Question number: 11

MCQ▾

### Question

A Galilean telescope consists of an objective of focal length 12 cm and eye-piece of focal length 4 cm. What should be the separation of the two lenses when the virtual image of a distant object is formed at a distance of 24 cm from the eye-piece?

### Choices

Choice (4) Response

a.

8.2 cm.

b.

12.4 cm.

c.

7.2 cm

d.

2.8cm.

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