Question

A person is known to use a lens of
Pouler
-7.5D for his distant vision.
(11 43D for his near vision
Calculate the focal length of the le
used for correcting his
@ distant vision and
6 Near vision Problem​

Answer 1

Answer:

7.5

Step-by-step explanation:

THE DEFECT OF THE PERSON IS=MYOPIA

FOCAL LENGTH = -D

-7.5 D is given so the focal length of the lens is 7.5 cm

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Answer 2

Answer:

Here it is......

We know that...

• P=1/f (in metre)
• -7. 5 =1/f
• f= -1/7.5 m is the ans.
• (The person is suffering from myopia and having negative focal length shows concave lens which is used for correcting it)