This question is in regards to Radiology physics. Here a few more. Find frequency for 2.4 Mev and 35 ev. I would like to have step by step instructions please. I'm having trouble figuring out what needs to be converted, if any. Thanks
2007-10-08 17:33:50 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Energy in ev converted to Joules as 1 ev = 1.6*10^-19 J.
Energy of the electromagnetic wave is h*v, where v is frequency and h is Plank's constant 6.6*10^-34 J*sec. So frequency for 1 ev is 1.6*10^-19/6.6*10^-34 = 2.4*10^14 Hz.
For 35 ev multuply this frequency by 35 and for 2.4Mev multiply by 2400000.
2007-10-08 17:42:45 · answer #1 · answered by Alexey V 5 · 0⤊ 0⤋
Ev To Frequency
2016-10-18 08:35:20 · answer #2 · answered by leisinger 4 · 0⤊ 0⤋
Energy and frequency are related by:
E = hf where h = planck's constant = 6.62 x 10^-34 J-s
Now to go from Joules to electron volts (eV) divide Joules by 1.6 x 10^-19 J/eV
So then E(eV) = 6.62x10^-34/1.6x10^-19 *f
Now take you energy of 72 keV = 72 x 10^3 eV
then f = E(eV)1.6x10^-19/6.62x10^-34 = 1.74x10^19 Hz
2007-10-08 17:41:04 · answer #3 · answered by nyphdinmd 7 · 0⤊ 1⤋
e=hv
energy = Planck's constant times frequency
Planck's constant = 4.13566733 times 10^-15 eVs
So, just divide energy (in eV) by this format oh Planck's constant and voila!!!
2007-10-08 17:37:09 · answer #4 · answered by "Steve Jobs" 3 · 0⤊ 1⤋