Question

Calculate the de moglie Wavelength of election having kinetic energy of 400 ev​

Answer 1

Answer:

613.5 pm

Explanation:

We know that de Broglie wavelength of an electron :

λ = 1.227 / √E nm

λ = 1.227 / √400 nm

λ = 1.227 / 20 nm

λ = 0.6135 nm

λ = 0.6135 x 10⁻⁹ m

λ = 613.5 x 10⁻¹² m

λ = 613.5 pm

Answer 2

Wavelength

Wavelength of election having kinetic energy of 400 ev.

Solution:

• WE = 1.227 / √election nm
• WE = 1.227 / √e400nm
• WE = 1.227 / √20nm
• WE = 0.6136nm
• WE = 0.6136 x 10-⁹m
• WE = 613.5 x 10-¹²m
• WE = 613.5