Question # 1

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

Angle between the ray of light and the corresponding wavefront is:

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0°

60°

90°

120°

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

The contrast in the fringes in an interference pattern depends upon

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Fringe width

Relative difference intensities of the two sources

Distance between the slits

Wavelength

The size of the image is maximum when its distance from the magnifying glass is:

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0.10 m

0.15 m

0.20 m

0.25 m

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

Frequency of red color as compared to that of violet color is:

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Equal

Smaller

Greater

None of these

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

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

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5 cm

10 cm

15 cm

20 cm

When a source of light isat very large distance,the shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

The image of the tip of a needle is never sharp because of

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Polarization of light

Interference of light

Diffraction of light

Reflection of light

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

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

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Refraction

Reflection

Diffraction

Formation of spectrum

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