Question
Question: A metal surface ejects electrons when hit by green light but none when hit by yellow light. The elec...
A metal surface ejects electrons when hit by green light but none when hit by yellow light. The electrons will be ejected when the surface is hit by:
A
Blue light
B
Heat rays
C
Infrared light
D
Red light
Answer
Blue light
Explanation
Solution
: The photoelectric emission is possible if the wavelength of the incident light is less than that of yellow light