Question

A concave mirror of focal length 15cm form an image 30 cm from the mirror.how far is the object placed from the mirror?draw the ray diagram? according to class 10...​

Answer 1

Answer:

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Answer 2

Explanation:

We Know, 1/f= 1/u +1/v

Applying all values,

-1/15=1/u-1/30

Interchaning the sides

1/u = 1/15+1/30

1/u= (-2+1) /30

1/u = -1/30

u = - 30 cm

That means 30 cm in front of mirror

The diagram..

I am not a good artist the rays must pass through focal point