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If two mirrors are kept at 60^@ to each ...

If two mirrors are kept at `60^@` to each other, then the number of images formed by them is ......

A

5

B

6

C

7

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
The formula for the number of images formed by two inclined mirrors, inclined at angle `theta` is
`N = (360)/(theta) -1`
If `(360)/(theta)` = even whereas `N = (360)/(theta) "If" (360)/(theta)` = odd
For `theta = 60^(@) , N = (360)/(60) = 6 `
Hence , N = 6-1 = 5
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Knowledge Check

  • If two lenses of power 2D and 3D are kept in contact with each other, then focal length of the combination will be .......... cm.

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