Answers

2015-04-05T19:33:21+05:30
1. The property of light travelling in straight lines which is rectilinear propagation of light. As it does not scatter all over the place, a strong parallel beam is obtained on the screen.
2. When the light falls on the screen it is reflected back to our eyes which enables us to see.
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2015-04-09T07:24:51+05:30
The reflection cause this property to see the path of light in the darkness of a cinema hall
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