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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
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 # 2
Speed of light in vacuum depends upon:
Question # 3
Resolving power in mth order diffraction for grating is given by:
Question # 4
Monochromatic light means waves of:
Question # 5
When the object lies between F and 2F, the image formed by is formed at:
Question # 6
Light waves are:
Question # 7
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 8
A convex lens acts as diverging lens when the object is placed:
Question # 9
The ratio of the size of the image to that of object is called:
Question # 10
Stars twinkle due to
Question # 11
When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
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
Huygen's principles states that:
Question # 14
Resolving power in mth order diffraction for grating is given by:
Question # 15
A prism splits a beam of white light into seven component colors. This is so because
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