Question
Physics Question on Wave optics
Light of certain wavelength and intensity ejects photoelectrons from a metal plate. Then this beam is replaced by another beam of smaller wavelength and smaller intensity. As a result
A
kinetic energy of the photoelectrons decreases but the strength of the photoelectric current increases
B
kinetic energy of the photoelectrons increases but the strength of the photoelectric current decreases
C
no change occurs
D
emission of photoelectrons stops.
Answer
kinetic energy of the photoelectrons increases but the strength of the photoelectric current decreases
Explanation
Solution
Photocurrent decreases but K.E. of photoelectrons increase