2. Solved Papers
  3. Uttarakhand PMT

Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    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 electrons from the same surface by

    A)  yellow light of same intensity which is more than \[I\]

    B)  green light of any intensity

    C)  red light of any intensity

    D)  none of the above

    Correct Answer: B

    Solution :

     \[{{\lambda }_{red}}>{{\lambda }_{violet}}\] VIBGYOR pattern shows that VIBG all have\[\lambda \] less than that of yellow colour and hence can initiate photoelectric effect irrespective of intensity.


You need to login to perform this action.
You will be redirected in 3 sec spinner