Question # 1

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 terms phase difference and path difference are:

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Same

Different

Equal

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 order to get interference using two light rays

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The sources should be monochromatic and coherent

The sources should have the same frequency

Superposition should be linear

All of these

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

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

If the object is situated at focus of a convex lens, then its image is formed at:

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F

2F

Infinity

None of these

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

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

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6 x 10^-5rad

7 x 10^-5rad

8 x 10^-5rad

None of these

The property of light which does not change with the nature of the medium is:

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Frequency

Amplitude

Wavelength

None of these

Huygen principle is used to determine:

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Speed of light

Location of wavefront

About polarized or unpolarized light

None of them

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

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0°

60°

90°

120°

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

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

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

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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