Question

-What is the wavelength of an X-ray photon with energy 9.0 keV (9000 eV )? (1 eV = 1.60 × 10 −19 joule.)

-What is its frequency?

Answer 1

Here is the correct calculation for the wavelength of an X-ray photon with energy 9.0 keV:

wavelength = hc/E

= (6.63 x 10^-34 J*s) * (2.998 x 10^8 m/s) / (9000 eV * 1.60 x 10^-19 J/eV)

= 1.53 x 10^-11 m

To find the frequency of the photon, we can use the equation:

frequency = c/wavelength

Plugging in the values, we get:

frequency = (2.998 x 10^8 m/s) / (1.53 x 10^-11 m)

= 1.95 x 10^19 Hz

This is the frequency of the X-ray photon.