1. The following are top-view diagrams of solid cylinders and cubes. Assume that

Question

1. The following are top-view diagrams of solid cylinders and cubes. Assume that light travels more slowly through the objects than through the surrounding medium. Each diagram shows a path for light that is not qualitatively correct; there is at least one flaw. perhaps more, in each diagram. Identify all flaws. Explain your reasoning. 2. A very small bulb, a Plastic rectangular block of plastic, a piece of cardboard, and a screen are placed as shown at right. Imagine that the room is darkened and the bulb is turned on. Very small bulb Cardboard Screen If the plastic were removed, would the height of the shadow on the screen increase, decrease, or stay the same? Explain your reasoning. and support your answer with a clear ray diagram.

Explanation / Answer

1a) refracted ray cant coincide with normal. Angle of refraction is zero only if angle of incidence is zero.

B) Light bends at the medium boundary, not arbitrarily in the medium.

C) if in the first refraction, light bends towards normal, then in second it should bend away from normal.

D) same reason,   if in the first refraction, light bends towards normal, then in second it should bend away from normal.

Also angle of refraction is zero only if angle of incidence is zero.

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