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PHY103

Question: In a YoungVs double-slit experiment the center of a bright fringe occurs wherever waves from the slits differ in the distance they travel by a multiple of:
Answer:  a wavelength

Question: Unpolarized light is incident on a plane glass surface. What should be the angle of incidence such that the reflected and refracted rays are perpendicular to each other?
Answer:  57A°

Question: Critical angle is that incident angle in denser medium for which angle of refraction is
Answer:  90

Question: A window which can transmit all the incident light without any reflection is called
Answer:  Non-reflecting window

Question: What should be the phase difference between the two plane-polarized waves, vibrating at right angles to each other, to produce circularly polarized light?
Answer:  l€/2

Question: The velocity of light in water is 2.2 X 108Â m/s. What is the polarizing angle of incidence?
Answer:  53.74

Question: The effect in which white light separates into different colours is called
Answer:  dispersion

Question: Extra distance travelled by one of waves compared with other is called	
Answer:  path difference

Question: If the phase difference between two rays is l€/2 and the angle of incidence not equal to l€/4, the emergent light is
Answer:  Elliptically Polarized

Question: If a convex lens of focal length f is cut into two identical halves along the lens diameter the focal length of each half is
Answer:  2f



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