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

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 2

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

Question # 3

The magnifier forms a virtual image of the object at:

Question # 4

Huygen principle is used to determine:

Question # 5

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

Question # 6

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

Question # 7

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 # 8

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

Question # 9

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

Question # 10

For the virtual image, option _______ is not correct:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The appearance of the colour in the soap (oil) film results from:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 The contrast in the fringes in an interference pattern depends upon
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
3 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
4 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
5 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
6 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
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 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
9 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
10 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them

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