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

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 # 2

Wave length of light, on the average, is given by:

Question # 3

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

Question # 4

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 5

The least distance of distinct vision is:

Question # 6

A magnifier gives an image which is:

Question # 7

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

Question # 8

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 # 9

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

Question # 10

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 # 11

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 12

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

Question # 13

The distance from eye to near point is taken as:

Question # 14

When a source of light isat very large distance,the shape of wavefront is:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
2 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
3 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
4 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
5 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
6 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
7 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
8 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
9 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
10 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:
A. Double the size
B. Same size
C. Half the size
D. None of these

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