Question

A person needs a lens of power
-5.5 dioptres for correcting his distant vision. For correcting his
near vision, he needs a lens of power +1.5 dioptres. What is the
focal length of the lens required for correcting distant vision?

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Answer 1

$\huge\underline\mathrm\purple{Answer}$

power=1/focal length

-0.5=1/f

f=-2m

1.5=1/f

f=2/3m

Answer 2

$\huge\star\underline\mathfrak\red{Answer:-}$

power=1/focal length

-0.5=1/f

f=-2m

1.5=1/f

f=2/3m

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