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

00:00
Question # 1

With age, least distance of distinct vision:

Question # 2

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

Question # 3

The locus of all points in a medium having same phase of vibration is called

Question # 4

In order to get interference using two light rays

Question # 5

The magnifier forms a virtual image of the object at:

Question # 6

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 7

Laws of reflection and refraction can also be explained by:

Question # 8

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

Question # 9

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

Question # 10

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 11

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 # 12

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

Question # 13

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

Question # 14

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 # 15

Light waves are:

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ECAT Class Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
2 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
3 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
4 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
5 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
6 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:
A. 6 x 10-5rad
B. 7 x 10-5rad
C. 8 x 10-5rad
D. None of these
7 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
8 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
9 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:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
10 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

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