Question

$\huge \underline{\sf\red{question}}$

✨A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of
the lens. Is the prescribed lens diverging or converging?

Answer 1

Explanation:

Given,

Power, P=1.5D

focal length in metres, f= $\frac{1}{p}$

f = $\frac{1}{1.5} \: m$

f = $\frac{2}{3} \: m$

= $\frac{2}{3} \: \times \: 100$

f = 66.7cm

The power is positive, lens is convex i.e., converging