Question

an object 3 cm high is placed at a distance of 10cm in front of a concave mirror of focal length 20 cm find the position nature and size of the image forrmed​

Answer 1

Answer:

Secondary School Science 5+3 pts

An object 3cm high is placed at a distance of 10 cm in front of a converging mirror of focal length 20 cm. Find the position, nature and size of the image formed.

Report by Ravi1oth 26.10.2017

Answers

Mohdkaif2004Helping Hand

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Given,

height of the object = 3cm

object distance = 10cm

focal length = 20cm

NOW,

According to Mirror formula,

1/f = 1/u + 1/v

1/v = -1/20 - (-1/10)

= -1/20 + 1/10

= (-1+2)/20

= 1/20

v = 20cm

NOW,

-v/u = h(I)/h(o)

-20/-10 = h(I)/ 3

h(I) = 2×3

h(I) = 6 cm