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

Huygen principle is used to determine:

Question # 2

The cause of mirage observed in deserts in bright sunlight is due to

Question # 3

Light has:

Question # 4

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

Question # 5

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 # 6

A magnifier gives an image which is:

Question # 7

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

Question # 8

Laws of reflection and refraction can also be explained by:

Question # 9

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 10

According to Huygen's principle

Question # 11

The distance from eye to near point is taken as:

Question # 12

A line which represents the direction of travel of a wave is known as:

Question # 13

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

Question # 14

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

Question # 15

To sources are said to be coherent if they have:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
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:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
2 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
3 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
4 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
5 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
6 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
7 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
8 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
9 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
10 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these

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