Question

object 30 cm tall is placed in front of a convex lens its 10 cm tall inverted image is formed at screen 15 CM away from lens find its f and p of the lens​

Answer 1

Answer:

Step-by-step explanation:

h =30cm

h'=-10cm

v=15cm

m=h'/h

= -10/30

= -1/3

m= v/u

-1/3=15/u

u=15x-3

= -45

1/f=1/v-1/u

= 1/15- 1/(-45)

=4/45

f=45/4

= 11.2cm

P =1/f

=1 /(11.2)/100

=1/0.112

=8.9D