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

Light has:

Question # 2

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

Question # 3

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 # 4

If the object is situated at focus of a convex lens, then its image is formed at:

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

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

Question # 7

The wave nature of light was proposed by:

Question # 8

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 9

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

Question # 10

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 11

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

Question # 12

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

Question # 13

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 # 14

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

Question # 15

The terms phase difference and path difference are:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
3 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
4 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
5 Stars twinkle due to
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
6 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
7 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
8 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
9 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
10 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves

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