- #1
dawn_pingpong
- 50
- 0
I have a question:
A stopping potential of 0.5 V is required when a phototube is illuminated with monochromatic light of 490nm wavelength. The wavelength of a different monochromatic illumination for which the stopping potential is 1.50V is closest to:
a) 350nm
b) 330 nm
c) 380nm
d) 400 nm
e) 500 nm
I am not very clear with the concept of this whole thing, so it will be nice if anyone can explain the concepts (or rather what are the fornulas) too. Thank you.
A stopping potential of 0.5 V is required when a phototube is illuminated with monochromatic light of 490nm wavelength. The wavelength of a different monochromatic illumination for which the stopping potential is 1.50V is closest to:
a) 350nm
b) 330 nm
c) 380nm
d) 400 nm
e) 500 nm
I am not very clear with the concept of this whole thing, so it will be nice if anyone can explain the concepts (or rather what are the fornulas) too. Thank you.