Question

the power of a lens is 0.2d then its focal length is

Answer 1

0.05 is the is the focal length of the lense having 0.2d

Answer 2

$\bold{\boxed{HEY!!!}}$

$<b>Here is your answer :-$

$\underline{GIVEN}$

Power of lens = 0.2 d

$\underline{\:TO\:FIND}$

Focal lenght ( f ) = ?

$\underline{SOLUTION}$

We know that

Power = 1/f

0.2 = 1/f

f = 1/0.2

$\bold{\boxed{f = 5 m }}$

$<marquee>THANKS...$