Question
Question: A metallic surface ejects photoelectrons when hit by green light but none when hit by yellow light. ...
A metallic surface ejects photoelectrons when hit by green light but none when hit by yellow light. Will the electrons be ejected if the same surface is hit by red light?
A
Yes
B
Yes, if the red beam is sufficiently intense
C
Yes, if the red beam is allowed to fall for sufficient duration
D
No
Answer
No
Explanation
Solution
*Green is a threshold of metal
So it is not possible from red light.