Question # 1

The distance from eye to near point is taken as:

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10 cm

15 cm

20 cm

25 cm

A prism splits a beam of white light into seven component colors. This is so because

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Phase of different colors is different

Amplitude of different colors is different

Wavelength of different colors is different

Velocity of different colors is different

The least distance of distinct vision is:

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10 cm

25 cm

50 cm

100 cm

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

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0°

60°

90°

120°

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

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Equal

Smaller

Greater

None of these

The appearance of the colour in the soap (oil) film results from:

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Dispersion

Interference

Reflection

Refraction

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

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

Stars twinkle due to

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The fact that they do not emit light continuously

The refractive index of earth's atmosphere fluctuates

The Star's atmosphere absorbs its light intermittently

None of these

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

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

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5 cm

10 cm

20 cm

25 cm

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

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Real

Virtual

Diminished

Erect

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

Huygen's principles states that:

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Light travels in straigth line

Light has dual nature

Either of these

None of these

To observe interference of light, the condition, which must be met with is that the sources must be:

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Monochromatic

Phase coherent

Both of above

None of above

In case of point, source of light shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

Which one of the following can act approximately as a source of monochromatic light;

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Neon lamp

Fluorescent tube

Sodium lamp

None of these

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

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