COMEDK Exam 2017 Solved Paper

© examsiri.com

Question : 14 of 180

Marks: +1, -0

Which of the following is a wrong statement?

D=‌
1
f
, where f is the focal length and D is called the refractive power of a lens.
Power is called a dioptre when f is in metres.
Power is called a dioptre and does not depend on the system of unit used to measure f.
D is positive for convergent lens and negative for divergent lens.

Go to Question:

Prev Question

Next Question