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Physics  Ex-47

Question-14

The set up below consists of an object and its shadow cast on a screen by a point light source.

Click

Click

Determine the position of the light source.

A)  Point-A

B)  Point-B

C)  Point-C

D)  Point-D

Draw a line from the top of the shadow to the top of the object and then extend the line to the light source.

This problem illustrates the fact that light travels in a straight line, technically known as rectilinear propagation .

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