Question

What is the focal length of a lens of 2D?

Answer 1

❗ ANSWER ❗

Power of a lens is -2D, negative sign indicates it is a Concave lens. Focal length (in meters)=1/power of the lens, thus focal length=1/2=0.5m=50cm.

Hope it's helpful dear...........

❌ Mahi Here ❌

Answer 2

$\huge{\underline{\red{\mathfrak{♡Answer♡}}}}$

Focal length is inverse of power of lense.... F= 1/ P . so focal lenght of lens of power +2D is 0.5 m.