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

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

Question # 2

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

Question # 3

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

Question # 4

The focal length of convex lens having magnifying power of 5.55 is:

Question # 5

Light waves are:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

The wave nature of light was proposed by:

Question # 11

The distance from eye to near point is taken as:

Question # 12

In case of point, source of light shape of wavefront is:

Question # 13

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 14

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

Question # 15

Wave length of that color as compared to that of violet color is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
2 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
3 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
4 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
5 If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
A. Double the size
B. Same size
C. Half the size
D. None of these
6 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
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 magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
9 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
10 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them

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