Question

A photon is incident on a hydrogen atom. The photon moves the electron from an n = 5 energy level to an n = 10 energy level.

A: Is this an absorption or emission process? Choose one.

B: What is the wavelength, in nanometers, of the incident photon?

Answer 1

A) Since electron jumps from a lower energy level to a higher energy level ie, from 5 to 10

It is an absorption process.

B) Rydberg's equation will allow us to calculate the wavelength of incident photon ,

1/= R.(1/n1​​​​​2​​​​-1/n22​​​​​​)

Where n2n1

R is the Rydberg's constant

R= 1.0974×10^7 /m

n2= 10

n1=5

1/= 1.0974×10^7(1/25 -1/100)

=329220 m^-1

= 3.0375×10^-6 m= 3.037 nm