Question # 1

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

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Greater, smaller

Smaller, smaller

Smaller, larger

Greater, larger

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

Light appears to travel in straight line because

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It is not absorbed by the atmosphere

It is refracted by the atmosphere

Its wavelength is very small

Its velocity is very large

According to Huygen's principle

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light travels in straight line

Light is a transvers wave

Light has dual nature

All points on the primary wave-front are the sources of secondary wavelets

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

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Diffraction

Interference

Polarization

Dispersion

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

Light waves are:

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Transverse wave

Longitudinal wave

Compressional wave

None of them

The ratio of the size of the image to that of object is called:

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Focal length

Aperture

Linear magnification

Principal axis

For the virtual image, option _______ is not correct:

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1/p = 1/f -1/q

1/f = 1/p -1/q

1/p=1/p-1/f

1/p=1/f+1/q

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

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Greater than

Smaller than

Equal to

None of these

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

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Double the size

Same size

Half the size

None of these

Laws of reflection and refraction can also be explained by:

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Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

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Bright

Dark

Any of A and B

None of these

Conventionally, all the distance p, q, f are measured from _____ of the lens:

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Focus

Optical center

Edges

None of these

The cause of mirage observed in deserts in bright sunlight is due to

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Refraction of light

Reflection of light

Scattering of light

Total internal reflection of light

With age, least distance of distinct vision:

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Increases

Decreases

Is not affected

None is correct

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