Question

Power of lens is 2 diapter what does it mean?​

Answer 1

Answer:

there is a convex lens of power 2D

Answer 2

$\huge{\underline{\text{Explanation:}}}$

Power of lens is 2 diopter. This means that the lens is convex.

Why?

We know that in a convex lens,

1. v = Positive
2. u = Negative
3. f = Positive

Where,

• v = Image distance
• u = Object distance
• f = Focal length

We know that:

⇒ Power = 1/Focal Length

We are given that, power of lens is 2 diopter. Since the power is positive, it's focal length will also be positive.

Therefore, The lens is convex.

Know more:

• Person suffering from Myopia = Power (Negative). Person suffering from Myopia can be corrected by using concave lens.
• Person suffering from Hypermetropia = Power (Positive). Person suffering from Hypermetropia can be corrected by using convex lens.