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

Monochromatic light means waves of:

Question # 2

Laws of reflection and refraction can also be explained by:

Question # 3

The magnifier forms a virtual image of the object at:

Question # 4

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

Question # 5

Light appears to travel in straight line because

Question # 6

Huygen's theory cannot explain

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The locus of all points in a medium having same phase of vibration is called

Question # 13

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

Question # 14

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
2 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
3 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
4 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
5 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
6 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
7 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
8 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
9 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
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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