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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
00:00
Question # 1
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 2
Stars twinkle due to
Question # 3
The distance from eye to near point is taken as:
Question # 4
With age, least distance of distinct vision:
Question # 5
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 # 6
For the virtual image, option _______ is not correct:
Question # 7
Light has:
Question # 8
A convex lens acts as diverging lens when the object is placed:
Question # 9
The locus of all the points in the same phase of vibration is called:
Question # 10
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 11
In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
Question # 12
According to Huygen's principle
Question # 13
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 14
The magnifier forms a virtual image of the object at:
Question # 15
Wave length of light, on the average, is given by:
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