Question

Which of the following statements is true about Planck's Law?

The frequency of the emitted light is inversely proportional to the energy given off by the electrons.

The frequency of the emitted light is directly proportional to the energy given off by the electrons.

The wavelength of the emitted light is directly proportional to the energy given off by the electrons.

The wavelength of the emitted light is inversely proportional to the energy given off by the electrons.

Answer 1

E = h*v
h = planks constant
v = frequency
But v = c/wavelength frequency = speed of light into wavelength.
We substitute c/wavelength into v and we get E =hc/lambda or wavelength.
This equation tells us that the energy and wavelength are inversely proportional. Energy is high wavelength will be low, and the opposite is true.