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Physics ECAT Pre Engineering Chapter 9 Physical Optics
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 9 Physical Optics
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Question # 1
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 2
The magnifier forms a virtual image of the object at:
Question # 3
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 # 4
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 # 5
A virtual image is formed when 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
Which one of the following can act approximately as a source of monochromatic light;
Question # 8
Wave length of light, on the average, is given by:
Question # 9
A convex lens acts as diverging lens when the object is placed:
Question # 10
Wave length of that color as compared to that of violet color is:
Question # 11
Least distance of distinct vision of an old man possibly becomes:
Question # 12
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 13
If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
Question # 14
Angle between the ray of light and the corresponding wavefront is:
Question # 15
Monochromatic light means waves of:
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