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

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 2

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 3

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

Question # 4

The image of the tip of a needle is never sharp because of

Question # 5

The contrast in the fringes in an interference pattern depends upon

Question # 6

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

Question # 7

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 8

According to Huygen's principle

Question # 9

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 # 10

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

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 13

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

Question # 14

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

Question # 15

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these
2 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
3 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
4 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
5 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
6 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
7 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
8 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
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 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted

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