Question

what is mean by focal length?

Email use or not

suryansh ​

Answer 1

Answer:

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.

Explanation:

plz barainlest mark kar do

Answer 2

Explanation:

focal length is the length of focal