Question

The focal length of the convex lens is 10m.what is it's power?​

Answer 1

focal length=+10m (given)

power=1/focal length

so 1/10

ans= 0.1D

Answer 2

Answer:

$focal \: length \: = 10m \\ power \: of \: lens = 1 \div focal \: length \\ power = 1 \div 10 \\ power = 0 .1 \\ \\ hope \: it \: helps \\ \\ \: \: \: \: \: \: divu$