Question

A object is placed at a distance of 30 cm from a convex lens of focal length 20 cm (a) Find the position of the object (b) Is the image real or virtual? (c) Is the image erect or inverted?

Answer 1

Answer:

Explanation: u=-30cm, f= 20 cm

Using lens formula-

1/v-1/u= 1/f

1/20-1/30=1/v

3-2/60=1/v

V=60cm

Image will be virtual as it's magnification will come out to be positive.

Nd it will be erect.

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Answer 2

SOLUTION

Given - u=-30cm

f=20cm

using lens formula

1/v-1/u=1/f

1/v-1/30=1/20

1/v=3-2/60=1/60

v=60

Image will be virtual because it's magnification will come out positive .

it will be erect

GIVEN BY GAURAV YADVANSHI