A. λ = 3 m
B. E = 1.9878 x 10⁻³³ J
C. Total energy : 1.9878 x 10⁻²⁰ J
Further explanation
The photoelectric effect is an electron coming out of a metal because of electromagnetic radiation
One type of electromagnetic radiation is light
Radiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
A. wavelength
[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{1.10^8~Hz}=3~m[/tex]
B. energy of one photon
[tex]\tt E=h\times f\\\\E=6.626\times 10^{-34}\times 3=1.9878\times 10^{-33}~J[/tex]
C. Total energy
[tex]\tt 1.9878\times 10^{-33}\times 10^{18}=1.9878\times 10^{-20}[/tex]
