Question

Calculate the wavelength (in nm) of light with energy 1.57 × 10−20 J per photon.

For light of wavelength 430 nm, calculate the number of photons per joule. Enter your answer in scientific notation.

Determine the binding energy (in eV) of a metal if the kinetic energy possessed by an ejected electron (using one of the photons with wavelength 430 nm) is 3.33 × 10−19 J