Fix a comb on one side of a large thermocol sheet and fix a mirror on the other side as shown in the figure. Spread a dark-coloured sheet of paper between the mirror and the comb. Keep this in sunlight or send a beam of light from a torch through the comb. What do you observe? Do you get a pattern similar to that shown in figure?
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Answer:
We observe the "Refection of light". The ray of light approaches the smooth polished surface of the mirror and the light ray bounces back and gives a pattern similar to that on the black sheet.