# Ray Optics (NEET Physics): Questions 71 - 75 of 105

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## Question number: 71

» Ray Optics » Mirror Formula

MCQ▾

### Question

A short linear object of length b lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror. Find the approximate size of the image.

### Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

## Question number: 72

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

MCQ▾

### Question

For a Plano-convex lens of radius of curvature 10 cm, the focal length is 30 cm, if the refractive index of the material of the lens is,

### Choices

Choice (4) Response

a.

1.5

b.

1.33

c.

1.66

d.

2.0

## Question number: 73

MCQ▾

### Question

Resolving power of a microscope doesn’t depend upon

(1) Velocity of light used

(2) Frequency of light used

(3) Focal length of objective

(4) Wavelength of light used

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1, 2 and 3 are correct

## Question number: 74

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

MCQ▾

### Question

A glass prism of refractive index 1.5 and angle of prism 6° is put in contact with another prism of refractive index 1.6 when a ray of light is made incident on this combination normally then it emerges out undeviated. The angle of second prism will be

### Choices

Choice (4) Response

a.

b.

c.

6 0

d.

## Question number: 75

» Ray Optics » Snell's Law

MCQ▾

### Question

A ray of light incident on a prism surface at an angle of 50° in the minimum deviation position. If the angle of prism is 60° then the values of δ m and µ will be respectively- (sin 50° = 0.766)

### Choices

Choice (4) Response

a.

60° and 1.532

b.

0° and 1.532

c.

40° and 1.532

d.

90° and 1.532

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