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ultraviolet light of wavelength 3200 a falls on a sodium surface. the maximum energy of the ˚ emitted photoelectrons is 1.6 ev. find the work function sodium.

Sagot :

ayfat23

The  work function sodium is 0.42J

What is UV radiation?

UV radiation can be described as one that is been used in the  industrial processes as well as the  medical and dental practices for  different application, this could be  killing bacteria, creating fluorescent effects, curing inks .

Energy = hc/  λ

where, work function = ϕ

where E= Energy= hc/λ

​ =(6.6×10 ^−34 *( 3×10 ^8)/(3.200×10 ^−7)

=61×10^ −20J.

Then,  maximum energy =  ϕ *E

but 1.6 ev=2.56348*10^-19J

2.56348*10^-19=2.56348*10^-19 *ϕ

then ϕ =2.56348*10^-19/61×10^ −20

ϕ =0.42J

Therefore, the work function sodium is 0.42J

Learn more about ultraviolet light on:

https://brainly.com/question/10717478

#SPJ4

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