Physics, asked by lovermmidniamilaks, 1 year ago

Define principal focus of alum

Answers

Answered by sawakkincsem
2
Principal focus is a point on the principal axis where the beam of light travelling parallel to the principal axis after refraction through the lens actually meet or appears to meet.
Answered by rashidkhna73
19

Answer:

a point on the principal Axis where all the rays incident parallel to principal Axis actually meet or appeared to meet after refraction through the given length is known as principal focus

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