What is the wavelength of a photon with an energy of 3.3810-19J?

To find the wavelength of a photon, you can use the equation E = hc/λ, where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength. Rearranging the equation to solve for the wavelength gives λ = hc/E. Plugging in the values for Planck's constant (h = 6.63 x 10^-34 J·s), the speed of light (c = 3.0 x 10^8 m/s), and the given energy (3.38 x 10^-19 J) will allow you to calculate the wavelength of the photon.