Question

Find the power of concave lens of focal length 2m.​

Answer 1

Answer:

Focal length of concave lens (f) = 2 m

Power of lens can be calculated using the formula

P= 1/f

P = 1/(-2)

P = – 0.5D

Answer 2

Answer:

Focal length (f) = 2m

Power (P) = ?

$p \: = \: \frac{1}{f} = \: \frac{1}{ - 2} \\ = - 0.5 \: dioptre$

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