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's principles states that:

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

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

Question # 4

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 5

The least distance of distinct vision is:

Question # 6

Monochromatic light means waves of:

Question # 7

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Light waves are:

Question # 12

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 # 13

Laws of reflection and refraction can also be explained by:

Question # 14

The focal length of convex lens having magnifying power of 5.55 is:

Question # 15

The locus of all points in a medium having same phase of vibration is called

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
2 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
3 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
4 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
5 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
6 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
7 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
8 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
9 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
10 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°

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