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  4. A metallic surface ejects electrons. When exposed to green light of intensity I but no photoelectrons are emitted, when exposed to yellow light of intensity I.It is possible to eject electron from the same surface by

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Q. A metallic surface ejects electrons. When exposed to green light of intensity $I$ but no photoelectrons are emitted, when exposed to yellow light of intensity $I$.It is possible to eject electron from the same surface by

VITEEEVITEEE 2014Dual Nature of Radiation and Matter

Solution:

Ejection of photoelectron does not depends on Intensity but on Frequency. Frequency of yellow and red light is less than that of green light so they can't eject photoelectrons.