Question

a lens has power p=5D.so it's focal length is f=0.2scm.(true or false)​

Answer 1

Explanation:

P=f1

5=\dfrac{1}{f}5=f1

f=\dfrac{1}{5}f=51

f=0.2\ mf=0.2 m

f=20 cmf=20cm

Answer 2

a lens has pawer p=5d.so it's focal length is f=0.2scm.

Explanation:

false