Question

B) In this case, the object is at 25 cm from the eye-lens, and the image is formed at 2.5
cm from the eye-lens. So, u = -25 cm, v = 2.5 cm. Then​

Answer 1

Answer:

m=9

Step-by-step explanation:

Given v = +25cm

f = 2.5cm

To find :- magnification 1 m

Solution :- from lens formula

v

1

−

u

1

=

f

1

u

−1

+

25

1

=

25

10

u

−1

=

25

9

⇒u=

9

−25

magnification m=

u

v

=

9×−25

259

m=−9

Answer 2

Answer:

m=9

Step-by-step explanation:

Given v = +25cm

f = 2.5cm

To find :- magnification 1 m

Solution :- from lens formula

v

1

−

u

1

=

f

1

u

−1

+

25

1

=

25

10

u

−1

=

25

9

⇒u=

9

−25

magnification m=

u

v

=

9×−25

259

m=−9

Step-by-step explanation: