Will the photoeffect occur if blue light (length = 480nm) falls on the surface of the tungsten plate?

Will the photoeffect occur if blue light (length = 480nm) falls on the surface of the tungsten plate? The work function of electrons from tungsten is 7.2 * 10 ^ 19 J.

λ = 480 nm = 480 * 10 ^ −9 m.
A = 7.2 * 10 ^ -19 J.
s = 3 * 10 ^ 8 m / s.
h = 6.6.10 ^ -34 J * s.
h * ν -?
h * ν = h * c / λ.
h * ν = 6.6.10 ^ -34 J * s * 3 * 10 ^ 8 m / s / 480 * 10 ^ −9 m = 4.12 * 10 ^ -19 J.
We see that the energy of photons h * ν = 4.12 * 10 ^ -19 J is less than the work function of electrons from matter A = 7.2 * 10 ^ -19 J. They do not have enough energy to snatch an electron from tungsten, the photoelectric effect occurs will not be.



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