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

 1840  205 VITEEEVITEEE 2014Dual Nature of Radiation and Matter Report Error

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.