Question

determine how far an object must be placed in front of a converging lens of focal length 10 centimetre in order to produce An erect image of linear magnification 4​

Answer 1

Answer:

Answer:− d

o

=7.5 cm

The lens equation expresses the quantitative relationship between the object distance d

o

, the image distance d

i

, and the focal length (f). The equation is stated as follows:

f

1

=

d

o

1

+

d

i

1

The magnification equation relates the ratio of the image distance and object distance:-

M=−

d

o

d

i

4=−

d

o

d

i

d

i

=−4d

o

------eqn (1)

10

1

=

d

o

1

+

d

i

1

-----eqn(2)

using eqn(1) and (2) solve for d

o

Answer 2

Refer above attachment

Hope it helps you