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An object is placed 20cm from a convex mirror its image is formed 12cm from mirror, find the focal length of the mirror

An object is placed 20cm from a convex mirror its image is formed 12cm from mirror, find the focal length of the mirror 

Grade:9

1 Answers

Pooman Arora
23 Points
one month ago
1/v + 1/u = 1/f
1/12 - 1/20 = 1/f
5-3/60 =1/f
2/60 = 1/f 
1/30 = 1/f 
f= 30
This was done by mirror formula 
Hope you understood
 

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