Question

Name the type of lens if it’s power is -2.0D find the focal length of this lens

Answer 1

Answer:

concave lens, focal lenght = 0.5 m,50cm

Explanation:

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Answer 2

Answer:

its concave lens as its power is negative.

Explanation:

p=-2.0D

p=1/f

f=1/p

=1/-2

= 0.5m

distance can't be negative

therfore f=0.5m