Answer:
The energy of electron is 3.978×10⁻¹⁹ j.
Explanation:
Given data:
Energy of electron = ?
Wavelength of electron = 5.00 ×10⁻⁷ m
Solution:
Formula:
E = hc/λ
E = energy
h = planck's constant (6.63×10⁻³⁴ j.s)
c = speed of light
λ = wavelength
Now we will put the values in formula.
E = 6.63×10⁻³⁴ j.s × 3×10⁸ m/s / 5.00 ×10⁻⁷ m
E = 19.89×10⁻²⁶ j.m /5.00 ×10⁻⁷ m
E = 3.978×10⁻¹⁹ j
The energy of electron is 3.978×10⁻¹⁹ j.
