Question

why we don't take D as negative in calculating magnifying power of a compound microscope where D stands for least distance of distinct vision please answer if you know faltu time waste nhi.​

Answer 1

Answer:

Given,

Focal length of convex lens, f=5cm

Position of image, v=25cm

Position of object, u=?

Apply lens formula

f

1

=

v

1

−

u

1

5

1

=

25

1

−

u

1

u=

4

25

cm

Magnifying power of instrument:

M=1+

f

D

M=1+

5

25

=6

Hence, object distance is

4

25

cm and magnifying power is 6

Answer By

Answer 2

Answer:

Hii Im .MD.DANISH.Hanif gzal