The energy of an X-RAY quantum of wavelength 1.0 X 10^-10 m is.

Question

its answer is 1.99 X 10^ -15, but i don't know how to solve it , thanks help please

Answer 1

Use these

E = hf
Energy = Planck's Constant x frequency

c = fλ
Speed of light = freq of the light * wavelength of the light

Answer 2

@ganonTEK

thanks SIr, i was just confusing frequency so i got 3 X 10^ 8 frequency and then multiplied it by planks constant and got exact answer , thanks

Answer 3

You're welcome :)
Remember, the higher the frequency the higher the energy. That's why we have Blu Ray players and not Red Ray players.