ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

Light waves are:

Question # 2

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 3

To see the minor details of the object by microscope, it should have:

Question # 4

The locus of all the points in the same phase of vibration is called:

Question # 5

In the formula R = N x m for diffraction grating, N denotes:

Question # 6

The magnifier forms a virtual image of the object at:

Question # 7

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

Question # 8

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

Question # 9

Huygen's principles states that:

Question # 10

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 11

Wave length of light, on the average, is given by:

Question # 12

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
2 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
3 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
4 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these
5 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
6 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
7 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
8 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
9 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
10 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

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