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

Huygen principle is used to determine:

Question # 2

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 3

Speed of light in vacuum depends upon:

Question # 4

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

Question # 5

The terms phase difference and path difference are:

Question # 6

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 # 7

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 # 8

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

Question # 9

Light has:

Question # 10

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

Question # 11

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

Question # 12

Laws of reflection and refraction can also be explained by:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
2 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
3 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
4 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
5 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
6 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
7 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
8 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
9 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
10 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

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