Question # 1

Short sightedness in the eye occurs due to the.

Choose an answer

Contraction of eyeball

Increases in focal length of eye lens

Reduction in focal length of eye lens

Reduction in distance between retina and eye lens

A person of height 1.5 m stands 2.0 m in front of a plane mirror How far from the person is her image .

Choose an answer

2.0 m

3.0 m

3.5 m

4.0 m

The variation of focal length of a lens when we pass from the central portion to periphery is called.

Choose an answer

Coma

Astigmatism

Spherical aberration

Chromatic aberration

A real object paled inside the focus of a convex lens gives

Choose an answer

Real image but diminshed

Real image but enlarged

virtual image but diminished

Virtual image but enlarged

In case of a convex lens the rays closed to and parallel to the principal axis will converge after refraction by the lens at a point.

Choose an answer

Optical centre

Principal focus

Focal plane

Principal axis

The aberration in the image formed by a lens due to different wavelengths present in a source is called.

Choose an answer

Spherical aberration

Chromatic aberration

Astigmation

Achromatic aberration

The index of refraction depends on

Choose an answer

the focal length

The speed of light

The image distance

The object distance

Loss of power is optical fibre result into

Choose an answer

Poor receipt ion of signals

Delay in time for reception of signals

accurate information at the receivers

All of the above

The real depth of a swimming pool is 2 m What is the apparent depth of the pool if the refractive index of water is 1.33

Choose an answer

1.0 m

1.5 cm

2.0 m

2.5 m

Michelson used the equation to determine the speed of light.

Choose an answer

c = 4 fd

c = 8fd

c =12 fd

c = 18 fd

Which of the following be used for redeciding mechanical aberration is optical instruments.

Choose an answer

Plane mirrors

Spherical mirrors

Concave lenses

Plano convex lenses

The erecting lens of a telescope produces

Choose an answer

A shorter instrument

wider field of view

A larger image

A sharp image

A bi prism consists of.

Choose an answer

Two parallel glass plates

Two acute angled prisms

Two obtuse angled prisms

Two right angled prisms

The object of a telescope is very large this is to have an image which is.

Choose an answer

More magnified

Of better resolution

More bright

More clear

When of the following colours scatters minimum.

Choose an answer

Blue

Violet

Yellow

Red

When we look at the sky during daytime the light that we see is sunlight that has been absorbed and then re radiated in different directions, This process is called.

Choose an answer

Scattering

Diffusion

Mirage

Rainbow

Reciprocal of the focal length is called.

Choose an answer

Radios of curvature of the lens

Power of the lens

Aperture of the lens

Resolving power

To reduce spherical aberration in optical instruments which of the following should be used.

Choose an answer

Plano convex lenses

Concave lenses

Spherical mirrors

Plane mirrors

For a prism of particular and given wavelength the resolving power varies as

Choose an answer

First power of lens of its base

Square of inverse length of its base

Increases of length of its base

Cube of the length of its base

In water drops rainbows are formed by

Choose an answer

Reflection

Refraction

Dispersion

All of these

A concave mirror is used to form an image of the sun on a white screen IF the lower half of the mirror were covered with an opaque card the effect on the image on the screen would be.

Choose an answer

Negligible

To make the image less bright than before

To make the upper half of the image disappear

To make the lower half of the image disappear.

More Classes

Other Links

PPSC Physics Chapter 4 Geometrical Optics MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer