# Ray Optics (BITSAT Physics): Questions 7 - 12 of 17

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## Question number: 7

» Ray Optics » The Eye

MCQ▾

### Question

If in Ramsdens’ eye piece, the field lenses have focal length respectively and separated by a distance then –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 8

» Ray Optics » Eyepiece Lenses

MCQ▾

### Question

Astigmatism can be corrected by using –

### Choices

Choice (4) Response

a.

Plane convex lenses

b.

Bifocal lenses

c.

Cylindrical lenses

d.

Concave spherical lenses

## Question number: 9

» Ray Optics » Magnification

MCQ▾

### Question

In order to obtain a real image of magnification 2 using a converging lens of focal length 20 cm, where should be an object be placed?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 10

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

MCQ▾

### Question

A ray of light passing through the optic centre of a thick lens is –

### Choices

Choice (4) Response

a.

Displaced and deviated

b.

Not displaced and but deviated

c.

Displaced but not deviated

d.

Question does not provide sufficient data or is vague

## Question number: 11

» Ray Optics » Mirror Formula

MCQ▾

### Question

An object is placed at a distance equal of focal length of convex mirror. If the focal length of the mirror be , then the distance of the image from the pole of the mirror is –

### Choices

Choice (4) Response

a.

More than

b.

Equal to

c.

Less than

d.

Infinity

## Question number: 12

» Ray Optics » Power of a Lens

MCQ▾

### Question

An optician prescribes spectacles to a patient with a combination of a convex lens of focal length and concave lens . The power of spectacles is –

### Choices

Choice (4) Response

a.

b.

c.

d.

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