A plane mirror of length 8 cm is present...

A plane mirror of length 8 cm is present near a wall in situation as shown in figure-. Then the length of spot formed on the wall is:

8 cm

4 cm

16 cm

None of these

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The correct Answer is:

Here, PA is the size of spot formed on the wall. From the similar triangle.

PS'Q and MS'N
` (PQ) /( MN) = (2d) / ( d ) `
` PQ = ( 2 ) MN = 2xx 8 = 16 cm `

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