Question

Question #de538

Answer 1

You can try wavelengths of visible light and energy.
You can use:
1) conversion between frequency `nu` and wavelength `lambda` for, say, the spectrum of white ligth (rainbow), using:
`c=lambda*nu`
Where `c` is the speed of light in vacuum (`c=3××10^8 m/s`)
2) relationship between energy `E` and frequency `nu` of a photon emitted or absorbed by an atom as:
`E=h*nu`
Where `h=6.63××10^(-34) Js` is Planck's constant.