Electrons make transition from n = 2 to n = 1 in a sample of excited hydrogen atom. Emitted photons strike on a metal of work function (φ)=4.2eV. What is the value of maximum kinetic energy of ejected electron in process?

Question

Electrons make transition from n = 2 to n = 1 in a sample of excited hydrogen atom. Emitted photons strike on a metal of work function (φ)=4.2eV. What is the value of maximum kinetic energy of ejected electron in process? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Ein=10.2 eV φ=4.2 eV KEmax=10.2-4.2=6eV The maximum kinetic energy in this case will be "6 eV".

Q. Electrons make transition from n = 2 to n = 1 in a sample of excited hydrogen atom. Emitted photons strike on a metal of work function $(ϕ) = 4.2 e V .$ What is the value of maximum kinetic energy of ejected electron in process?

$E_{in} = 10.2 e V$
$ϕ = 4.2 e V$
$K E_{ma x} = 10.2 - 4.2 = 6 e V$
The maximum kinetic energy in this case will be "6 eV".

Q. Electrons make transition from n = 2 to n = 1 in a sample of excited hydrogen atom. Emitted photons strike on a metal of work function (ϕ)=4.2eV. What is the value of maximum kinetic energy of ejected electron in process?

Ein​=10.2eV ϕ=4.2eV KEmax​=10.2−4.2=6eV The maximum kinetic energy in this case will be "6 eV".

Q. Electrons make transition from n = 2 to n = 1 in a sample of excited hydrogen atom. Emitted photons strike on a metal of work function $(ϕ) = 4.2 e V .$ What is the value of maximum kinetic energy of ejected electron in process?

$E_{in} = 10.2 e V$
$ϕ = 4.2 e V$
$K E_{ma x} = 10.2 - 4.2 = 6 e V$
The maximum kinetic energy in this case will be "6 eV".