ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

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

Question # 2

The terms phase difference and path difference are:

Question # 3

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

Question # 4

Huygen's principles states that:

Question # 5

Which one of the following can act approximately as a source of monochromatic light;

Question # 6

Light appears to travel in straight line because

Question # 7

Resolving power in mth order diffraction for grating is given by:

Question # 8

Angle between the ray of light and the corresponding wavefront is:

Question # 9

Light has:

Question # 10

Frequency of red color as compared to that of violet color is:

Question # 11

A virtual image is formed when object is placed:

Question # 12

The ratio of the size of the image to that of object is called:

Question # 13

Resolving power in mth order diffraction for grating is given by:

Question # 14

The least distance of distinct vision is:

Question # 15

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:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
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 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
4 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
5 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
6 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
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 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
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 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real

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