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Why the formula for finding the number of images formed when two plane mirrors are inclined at angle theta is having -1 if the number of images will come even. {360÷theta=X(even) -1} Please can you tell me why there is -1 if the number of images comes even.

Why the formula for finding the number of images formed when two plane mirrors are inclined at angle theta is having -1 if the number of images will come even. {360÷theta=X(even) -1} Please can you tell me why there is -1 if the number of images comes even.

Grade:8

1 Answers

Mayank Ranka
askIITians Faculty 280 Points
4 months ago
Hi,
Here’s your solution

if you observe , the number of images formed is equal to the number of reflections done by the two rays each moving to the different mirrors which can never be even

Thanks
Regards
Ankit Gupta
Askiitians

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