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

00:00
Question # 1

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

Question # 2

Light appears to travel in straight line because

Question # 3

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

Question # 4

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 # 5

Speed of light in vacuum depends upon:

Question # 6

With age, least distance of distinct vision:

Question # 7

According to Huygen's principle

Question # 8

To sources are said to be coherent if they have:

Question # 9

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

Question # 10

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 11

In an interference pattern of Young's double slit(YDS) experiment:

Question # 12

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

Question # 13

Monochromatic light means waves of:

Question # 14

Light has:

Question # 15

Conventionally, all the distance p, q, f are measured from _____ of the lens:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
2 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
3 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
4 In an interference pattern of Young's double slit(YDS) experiment:
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.

Central fringes are wider than the outer fringes
5 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
6 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
7 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
8 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
9 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
10 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller

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