Question

Good morning everyone ❤️


what is focul length?????​

Answer 1

Wish u a very very Good Morning to uuu... Have a Great day today☺☺☺☺☺

The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus.

Answer 2

The distance between the centre of a lens or curved mirror and its focus is known as focal length.