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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

Verified by Experts

The correct Answer is:
A, D

`(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 ENGLISH-REFLECTION OF LIGHT-Exercise Level 1 Subjective
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  7. Two plane mirrors each 1.6 m long, are facing each other. The distance...

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  8. Two plane mirrors are inclined to each other at an angle theta. A ray ...

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  9. Assume that a certain spherical mirror has a focal length of -10.0 cm....

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  10. A ball is dropped from rest 3.0 m directly above the vertex of a conca...

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  11. An object 6.0 mm is placed 16.5 cm to the left of the vertex of a conc...

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  12. An object 9.0 mm tall is placed 12.0 cm to the left of the vertex of a...

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  13. How far should an object be from a concave spherical mirror of radius ...

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  14. An object is placed 42 cm, in front of a concave mirror of focal lengt...

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  15. Prove that for spherical mirrors the product of the distance of the ob...

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