Question

power of the lens is _2D calculate focal length​

Answer 1

Answer:

power of the lens= -2.0 D

p= 1/ f( in meter)

-2.0 = 1/f

f = 1/-2.0

f = - 0.5 m

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Answer 2

Answer:

Given:

Power=2D

Focal length=?

Solution-

Focal length=1/power

=1/2

=0.5 m

.•. focal length of the lens having power 2D is 0.5 metres