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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 11 - Photoelectric Effect > A metallic surface ejects electrons when exposed to green light of intensity I but not when exposed to yellow light of intensity I. It is possible to eject electrons from the same surface by (i) yellow light of some intensity which is more than I (ii) green light of any intensity (iii) red light of any intensity (iv) violet light of any intensity

A metallic surface ejects electrons when exposed to green light of intensity I but not when exposed to yellow light of intensity I. It is possible to eject electrons from the same surface by (i) yellow light of some intensity which is more than I (ii) green light of any intensity (iii) red light of any intensity (iv) violet light of any intensity

how many quanta are emitted per second by a 100 W lamp? Assume wavelength of visible light as 5.6×10^−5 cm. If 5% of the energy supplied to a bulb is irradiated as visible light