question_answer

Two beams, one of red light and the other of blue light, of the same intensity are incident on a metallic surface to emit photoelectrons. Which one of the two beams emits electrons of greater kinetic energy?             

Answer:

                Blue light emits electrons of greater kinetic energy because its frequency is higher than that of red light. K.E. of a photoelectron \[\propto \] Frequency of incident radiation