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

The least distance of distinct vision is:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

According to Huygen's principle

Question # 6

To sources are said to be coherent if they have:

Question # 7

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

Question # 8

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

Question # 9

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 # 10

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

Question # 11

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:

Question # 12

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

Question # 13

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

Question # 14

A virtual image is formed when object is placed:

Question # 15

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
2 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
3 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
4 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
5 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
6 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
7 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
8 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
9 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
10 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

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