The Power of a convex lens of focal length 25cm is :
Answer & explanation
Correct answer: option 3
$\text{Power of a lens is } P = \frac{100}{f} = \frac{100}{25} = 4D$
The Power of a convex lens of focal length 25cm is :
Correct answer: option 3
$\text{Power of a lens is } P = \frac{100}{f} = \frac{100}{25} = 4D$