a. describe Young's experiment in interference with necessary theory. b. Explain the refraction at a spherical surface using a schematic diagram. c. Mention the shape of wave front for the portion of wave front of light form a distant star intercepted by the earth.
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What is the shape of the wavefront in each of the following cases? a. Light diverging from a point source. b. Light emerging out of a convex lens when a point source is placed at its focus. c. The portion of the wavefront of light from a distanct star intercepted by the Earth.
a. When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why. b. When light travels from a rarer to a denser medium, the speed decreases. Does the reduction in speed imply a reduction in energy carried by the light wave? c. In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determine the intensity of light in the photon picture of light?
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