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

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

Question # 2

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 # 3

The appearance of the colour in the soap (oil) film results from:

Question # 4

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

Question # 5

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

Question # 6

A magnifier gives an image which is:

Question # 7

Light waves are:

Question # 8

Huygen's principles states that:

Question # 9

Laws of reflection and refraction can also be explained by:

Question # 10

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 11

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

Question # 12

The contrast in the fringes in an interference pattern depends upon

Question # 13

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 # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
2 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
3 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
4 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
5 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
6 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
7 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
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 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real

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