Question

If a lens has focal length of -15 cm and object is placed at -30 cm then find the value of v.​

Answer 1

Explanation:

u=-30

f =-15

using less formula.

1/f =1/v-1/u

1/-15=1/v-1/-30

1/-15=1/v+1/30

1/-15-1/30 =1/v

-2-1/30 1/v

-3/10=1/v

-1/10=1/v

v=-10