Three monochromatic 12 42nm 6 21nm each other in front of a

Last updated: 6/25/2023

Three monochromatic 12 42nm 6 21nm each other in front of a converging lens such that equal powers from the three equal to 1mW each fall on a converging lens and then on a small spherical conductor of radius r 1mm and work function 62 1eV Assume 50 efficiency of emission and no change in effective value of work function due to photoelectric emission and potential rise Use hc 1242eV nm All electrons emitted by the sphere are immediately removed by some non electrical mechanism At t 8 sec switch S is closed so that the sphere gets connected to the earth via a resistor of value 6 750 Find the current flowing just after the switch is closed S S S3 sources having wavelengths and 24 84nm are placed close to Your Answer 2 5 R R Ground