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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
Resolving power in mth order diffraction for grating is given by:
Question # 2
In an interference pattern of Young's double slit(YDS) experiment:
Question # 3
Resolving power in mth order diffraction for grating is given by:
Question # 4
When a source of light isat very large distance,the shape of wavefront is:
Question # 5
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 6
Wave length of that color as compared to that of violet color is:
Question # 7
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 8
Speed of light in vacuum depends upon:
Question # 9
Wave length of light, on the average, is given by:
Question # 10
Monochromatic light means waves of:
Question # 11
Stars twinkle due to
Question # 12
The focal length of convex lens having magnifying power of 5.55 is:
Question # 13
To observe interference of light, the condition, which must be met with is that the sources must be:
Question # 14
For the virtual image, option _______ is not correct:
Question # 15
The property of light which does not change with the nature of the medium is:
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