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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Huygen's principles states that:

Question # 7

The velocity of light in vacuum can be changed by changing

Question # 8

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

Question # 9

The wave nature of light was proposed by:

Question # 10

To sources are said to be coherent if they have:

Question # 11

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

Question # 12

According to Huygen's principle

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
2 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
3 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these
4 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
5 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
6 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
7 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
8 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
9 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
10 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

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