Question

An object is placed at a distance of 30 cm from a concave mirror of focal length 20cm. where will the image be formed. Draw ray diagram

Answer 1

Answer:

the image should be formed at a distance of 60cm.

Explanation:

here ,u=30cm

f=20cm

v=?

according to Mirror formula

1/v+1/u=1/f

Putting. these value we get ,

• 1/v+1/30=1/20
• 1/v=1/20-1/30
• 1/v=1/60
• =0.016
• v=60cm

Answer 2

Explanation:

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