Question

When an object is placed at a different stance of 15 cm of a concave mirror its image is formed at 10cm in front of the mirror calculate the focal length of the mirror​

Answer 1

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Answer 2

Answer:

u = 15 cm

v= 10 cm

now we know that

1/f= 1/v+ 1/u

1/f = 1/10-1/15

1/f = 3-2/30

1/f = 1/30

f = 30 cm

focal length of mirror = 30cm

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