Question # 1

Which type of image is produced by the converging lens of human eye if it views a distant object.

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminshed

Virtual, inverted, magnified

If the image is virtual then its distance from the lens is taken.

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Positive

Negative

Double

Half

Which of the following electron wavelength is used in electron microscope.

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Short

Extremely short

Large

Moderate

The power of convex lens of focal length 50 cm will be

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1,0 dioptre

2.0 dioptre

4.0 dioptre

5.0 dioptre

Which parameter determines the brightness of a light source sensed by an eye.

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Light energy entering the eye

Wavelength of light

Total radiant flux entering the eye

Total luminous flux entering the eye

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

The ablate of rays of different colours to converge a single point sifter refraction though a convex lens is called.

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Come

Distortion

Spherical aberration

Chromatic aberration

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

use of outer layer in optical fires called cladding is mainly to.

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Scatter thelight

Absorb unwanted light

Transmit the light

Produce total internal reflection

In compound microscope image formed by the eyepiece is

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Real

Inverted

erect

diminished

The bending of light when it enters a medium

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Reflection

Refraction

Diffraction

Total internal reflection

The index of refraction for a substance is

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Constant

Constant for a given wavelwngth

Variable with the speed of light

Never constant

Which of the following colours of light passes through glass with minimum speed.

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Green

Yellow

Red

Violet

A part of electromagnetic spectrum that can be detected by the human aye

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Angle of incidence

Angle of refraction

Light

Angle of reflection

The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so the lens acts as a magnifying glass.

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5 cm

10 cm

15 cm

20 cm

Which of the following are defects in human eye.

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Myopia

Hypermetropia

Presbyopia

All of these

The near point of a person is 50 cm and his far point is 200 cm The power of the lenses which his spectacles should have for reading will be

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+D

+2D

+4D

-2D

Colour of light is determined by its

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Amplitude

Velocity in air

Wavelength

State of polarization

the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33

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1.9 m

2.3 m

3.13 m

4.5 m

Monochromatic light passing through a thick prism is.

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Polarize

Disperesed

Diffracted

Deviated

The dioptre power of concave lens of 10 cm focal length is.

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0.1 dioptre

1.0 diopter

10 dioptre

-10 dioptre

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