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

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 2

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

Question # 3

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

Question # 4

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 5

Electromagnetic waves transport:

Question # 6

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

Question # 7

A convex lens acts as diverging lens when the object is placed:

Question # 8

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

Question # 9

Stars twinkle due to

Question # 10

For the virtual image, option _______ is not correct:

Question # 11

Light waves are:

Question # 12

When a source of light isat very large distance,the shape of wavefront is:

Question # 13

The magnifier forms a virtual image of the object at:

Question # 14

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

Question # 15

Huygen's theory cannot explain

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
3 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
4 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
5 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
6 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
7 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
8 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
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 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

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