The security scanning machine at the airport produces X-Ray of wavelength 4x10^-10m. What is it’s frequency? (Answer is 7.5x10^17Hz, I just need the working)

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

massxgravity x heght=weightxheight= pe

4900=490xh

h=10