ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 9 Physical Optics

Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics

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ECAT Physics Chapter 9 Physical Optics

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Question # 1

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

Question # 2

The contrast in the fringes in an interference pattern depends upon

Question # 3

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 4

Resolving power in mth order diffraction for grating is given by:

Question # 5

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 6

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

Question # 7

Electromagnetic waves transport:

Question # 8

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

Question # 9

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:

Question # 10

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 11

The distance from eye to near point is taken as:

Question # 12

Least distance of distinct vision of an old man possibly becomes:

Question # 13

The magnifier forms a virtual image of the object at:

Question # 14

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

Question # 15

Speed of light in vacuum depends upon:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
2 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
3 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
4 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
5 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
6 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
7 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
8 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
9 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
10 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light

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