- #1
shar_p
- 14
- 0
Homework Statement
Monochromatic light of wavelength 4.5 x 10-7 m will eject electrons from the surface of a
metal with a maximum KE of 3.2 x 10-19 Joules. Will light having a wavelength of 6.8 x 10-7
m also cause emission of electrons from this metal
Homework Equations
E = h.c/lambda
KEmax = E - work function
The Attempt at a Solution
In order for the emission to occur, the E > wo
E = [(6.67x10^-34)(3.0x10^8)]/wavelength
so we can find E for wavelength 4.5x10-7 and for wavelength 6.8x10-7
How do we find wo? (work function)