he energy of a Photon of light is 1.5 X 10 (-28th power) what is the wave length"?

Question

Need to figure what formula to use , So I can undewrstand how to work the rest of the problems I have in this same set up
thank you

Answer 1

Please, specify the unit of energy. if you just give a number, no body would be able to know if it is in erg, joule, horsepower, kilowatt-hour, calorie, or food Calories. Likewise, if I would tell you the wave length to be 1.00, you would have no idea if the unit is in pm, or nm, A, μm, mm, cm, dm, m, km, Mm, or even my personal unit.