Question

A point object is placed at a distance of 20cm from a convex mirror of focal length 20cm. The image will form at:​

Answer 1

Answer:

at optical centre

Explanation:

the mirror is convex

i = -20

f= -20

1/f = 1/v - 1/u

1/v = 1/f - 1/u

1/v = -1/20 - -1/20

1/v = -1/20 +1/20

1/v = 0

v=0

therefore the image will be formed at the optical centre

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Answer 2

Answer:

infinity

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