Question

the person cannot see objects clearly beyond 50cm. the power lens to correct the vision is ______
a) + 5 D
b) - 0.5 D
c) - 2 D
d) + 2 D​

Answer 1

Answer:

—2D

Explanation:

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Answer 2

Answer:

power of lens=2D

Explanation:

power of lens=p

focal length=f

f=50cm

p=100÷f(in cm) (or) p=1÷f(in m)

p=100÷50

p=2D