Question

plz answer it. quickly ..........................

Answer 1

Answer:

Step-by-step explanation:

a) The lens is concave lens

b)Kavitha is suffering from myopia

c)

P = 1/f

now P= -2.5D

1/f=-2.5

=100/f=-2.5

f=100/2.5

=40cm

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Answer 2

Step-by-step explanation:

So let's start with the first question

The lens whose power is negative is concave.

So Concave lens is used by Kavita.

Now the second question

Concave lens is used to correct Nearsightedness ( Myopia)

So Kavita is suffering from Nearsightedness ( Myopia )

Now the third question

We know that P = 1/F where Focal length is in metre.

Substitute the values and you get

-2.5 = 1 / F

F = 1 / -2.5

F = -0.4 metre

F = -40 cm ( 1 m = 100 cm )

Hope you got all your answers

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