A point source of l8ght is kept at a dis†an ce of 15 cm from a conve – InterviewSolution

1.	A point source of l8ght is kept at a dis†an ce of 15 cm from a converging lens ,on its optical axis. The focal length of the lens is 10cm and its diameter of aperture is 3cm .A screen is placed on the other side of lens,perpendicular to axis of the lens ,at a dis†an ce of 20cm from it .Find the areawa of the illuminted part of screen?
Answer» A point source of l8ght is kept at a dis†an ce of 15 cm from a converging lens ,on its optical axis. The focal length of the lens is 10cm and its diameter of aperture is 3cm .A screen is placed on the other side of lens,perpendicular to axis of the lens ,at a dis†an ce of 20cm from it .Find the areawa of the illuminted part of screen?

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