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

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

Question # 2

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:

Question # 3

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

Question # 4

A ray passing through optical center of a lens, after refraction:

Question # 5

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:

Question # 6

Light appears to travel in straight line because

Question # 7

The size of the image is maximum when its distance from the magnifying glass is:

Question # 8

The contrast in the fringes in an interference pattern depends upon

Question # 9

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 # 10

Light waves are:

Question # 11

The velocity of light in vacuum can be changed by changing

Question # 12

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

Question # 13

To sources are said to be coherent if they have:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
2 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
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 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
5 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
6 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
7 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
8 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
9 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
10 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

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