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Two plane mirrors each 1.6 m long, are f...

Two plane mirrors each 1.6 m long, are facing each other. The distance between the mirrors is
20 cm. A light incident on one end of one of the mirrors at an angle of incidence of `30^(@)`. How many times is the ray reflected before it reaches the other end?

Text Solution

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`(d)/(0.2)=tan 30^(@)=(1)/(sqrt(3))`
`:. D=(0.2/(sqrt(3))`
`N=(1.6)/d=8(sqrt(3))`
`=13.85`
therefore , actual number of reflection requried are 14.
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DC PANDEY-REFLECTION OF LIGHT-Exercise Level 1 Subjective
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  15. Prove that for spherical mirrors the product of the distance of the ob...

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