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

The magnifier forms a virtual image of the object at:

Question # 2

Resolving power in mth order diffraction for grating is given by:

Question # 3

Resolving power in mth order diffraction for grating is given by:

Question # 4

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

Question # 5

A virtual image is formed when object is placed:

Question # 6

Light has:

Question # 7

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

Question # 8

Huygen's principles states that:

Question # 9

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 # 10

The terms phase difference and path difference are:

Question # 11

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

Question # 12

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 13

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 # 14

The property of light which does not change with the nature of the medium 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 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 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
3 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
4 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
5 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
6 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
7 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
8 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
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 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion

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