Question

explain plzz The power of a lens is 6D Find the magnification produced by it for a real object placed at 15cm in front of it?a) 10b) -10c)1/10d) -1/10

Answer 1

Given:
P=6D
u=-15cm
P=1/f
6=1/f
f=1/6(in m)
f=100/6(in cm)
lens formula:
1/f=1/v-1/u
multiply by u on both sides
u/v-1=u/f
1/m=-15x6/100+1
=1/10
m=10
so option a is correct

Answer 2

Answer:

option a

Explanation:

Given that :

P=6D

u=-15cm

P=1/f

6=1/f

f=1/6(in m)

f=100/6(in cm)

By lens formula:

1/f=1/v-1/u

multiply by u on both sides :-

u/v-1=u/f

1/m=-15x6/100+1

=1/10

m=10

so option 'a' is correct.