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

Speed of light in vacuum depends upon:

Question # 2

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

Question # 3

The ratio of the size of the image to that of object is called:

Question # 4

Electromagnetic waves transport:

Question # 5

The velocity of light in vacuum can be changed by changing

Question # 6

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

Question # 7

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

Question # 8

Stars twinkle due to

Question # 9

Huygen's theory cannot explain

Question # 10

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

Question # 11

With age, least distance of distinct vision:

Question # 12

Light appears to travel in straight line because

Question # 13

According to Huygen's principle

Question # 14

The terms phase difference and path difference are:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
2 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:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
3 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
4 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
5 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
6 A convex lens acts as diverging lens when the object is placed:
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
7 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
8 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
9 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
10 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

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