# Ray Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 7 of 121

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## Question number: 1

» Ray Optics » Power of a Lens

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MCQ▾

### Question

The plane surface of a Plano-convex lens is silvered If radius of curved surface is R and refractive index is µ, then the system behaves like a concave mirror whose radius will be,

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 2

» Ray Optics » Total Internal Reflection

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MCQ▾

### Question

A glass prism is dipped in water as shown in figure. A light ray is incident normally on the surface AB. It reaches the surface BC after T. I. R

### Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

## Question number: 3

» Ray Optics » Magnification

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MCQ▾

### Question

An object of length 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. The nature and size of the image are,

### Choices

Choice (4)Response

a.

Virtual, erect, 0.5 cm

b.

Real, inverted, 2.0 cm

c.

Real, inverted, 1.0 cm

d.

Virtual, erect, 1.0 cm

## Passage

A cylindrical tube filled with water is closed at its both ends by two silvered Plano convex lenses as shown in the figure. Refractive index of lenses L 1 and L 2 are 2.0 and 1.5 while their radii of curvature are 5 cm and 9 cm respectively. A point object is placed somewhere at a point O on the axis of cylindrical tube. It is found that the object and image coincide each other.

## Question number: 4 (1 of 3 Based on Passage) Show Passage

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

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MCQ▾

### Question

The length of the cylindrical tube is

### Choices

Choice (4)Response

a.

18 cm

b.

16 cm

c.

20 cm

d.

22 cm

## Question number: 5 (2 of 3 Based on Passage) Show Passage

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

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MCQ▾

### Question

The position of object w. r. t lens L 1 is

### Choices

Choice (4)Response

a.

12 cm

b.

8 cm

c.

10 cm

d.

14 cm

## Question number: 6 (3 of 3 Based on Passage) Show Passage

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

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MCQ▾

### Question

The position of object w. r. t lens L 2 is

### Choices

Choice (4)Response

a.

10 cm

b.

14 cm

c.

8 cm

d.

12 cm

## Question number: 7

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

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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.

4.4°, 0.0218°

b.

4.2°, 0.0348°

c.

1.2°, 0.0348°

d.

4.2°, 0.0138°

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