Question

power of lenses + 1 D then find the focal length​

Answer 1

power of lens = +1D

$p = \frac{1}{f(in \: metre)}$

$pf = 1$

$f = \frac{1}{p}$

$f = + 1$

Answer 2

Power(p) =+ 1D

p=1/focal length( in metres)

focal length in metres=1/p

=+1/1

=+1

focal length=1*100

=+100cm