What is an example of a Planck's constant practice problem?

1 Answer
Meave60
May 23, 2015

Planck's constant, "h", can be used to find the energy of a photon of electromagnetic radiation. The equation is E=hnu, where E is energy in Joules (J), h is Planck's constant, 6.626xx10(-34) J*s, and nu is the frequency. The unit for frequency is Hertz (Hz), and "1 Hz="1/s" .

Practice Problem

The energy of a photon of red light is 2.84xx10^(-19) "J". What is it's frequency?

Solve the equation E=hnu for nu.

nu=E/h =

(2.84xx10^(-19) cancel"J")/(6.626xx10(-34) cancel"J*s")=(4.29xx10^(14))/("s")=4.29xx10^(14)"Hz"

Related questions
See all questions in Planck's constant
Impact of this question
28309 views around the world
You can reuse this answer
Creative Commons License