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ECAT Physics Chapter 9 Physical Optics
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 9 Physical Optics
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Question # 1
The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
Question # 2
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 3
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 4
The wave nature of light was proposed by:
Question # 5
A convex lens acts as diverging lens when the object is placed:
Question # 6
In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
Question # 7
The magnifier forms a virtual image of the object at:
Question # 8
In an interference pattern of Young's double slit(YDS) experiment:
Question # 9
A ray passing through optical center of a lens, after refraction:
Question # 10
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 11
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 # 12
The ratio of the size of the image to that of object is called:
Question # 13
Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
Question # 14
Least distance of distinct vision of an old man possibly becomes:
Question # 15
If the object is situated at focus of a convex lens, then its image is formed at:
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