Physical Optics Mcqs

This collections of Multiple choice questions and answers focuses on study of Physical Optics in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Physical Optics in Physics comprehensively.

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1.
A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to

500 mm

5 x 10-3 mm

2 x 10-5 mm

2 x 10-3 mm

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3.
A point source of light placed in a homogeneous medium gives rise to

A cylindrical wave front

An elliptical wave front

A spherical wave front

A plane wave front

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5.
According to Einstein light travels form one place to another in the form of

Waves

Particles

Photons

It was not his discovery

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8.
Crystals of a material can behave as

Convex lens

Interferometer

Diffraction grating

Concave

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9.
Diffarction fringes are

Equally spaced

Distance between them increases

Distance between then decreases

They are adjacent with no space in between

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10.
Diffraction effect is

More for a round edge

Less for a round edge

More for a sharp edge

Less for a sharp edge.

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11.
gives the definition of metre in terms of wavelength of red cadmium light

Newton

Einstein

Michelson

Galileo

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12.
In a plane polarized light

Vibration in all direction

Vibration in two mutually perpendicular directions

Vibration take place in a direction perpendicular to the direction of propagation of light

No vibration at all

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13.
In an interference pattern

Bright fringes are wider than dark fringes

Dark fringes are wider than bright fringe

Both dark and bright fringes are of equal width

Central fringes are brighter than the outer fringes

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14.
In double slit experiment if one of the two slit is covered then

No interference fringes are observed

No diffraction fringes are observed

No fringes observed

Interference pattern not disturbed

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15.
In double slit experiment we observe

Interference fringes only

Diffraction fringes only

Both interference and diffraction fringes

Polirized frringes

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