Respuesta :
The photon is an elementary particle that serves as the quantum of the electromagnetic field.
What is a photon?
Your information is incomplete. Therefore, an overview will be given. Photon simply means a quantum of electromagnetic radiation
On the other hand, electrons simply mean negatively charged particles. It has a negative charge of electricity and travels round the nucleus of an atom.
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Maximum energy, in electron volts, of the photons of cathode ray tube is 2.45×10⁴ eV and maximum frequency, in hertz, of these photons is 5.91×10¹⁸ Hz.
What is energy produced in a cathode ray tube?
The energy produced in a cathode ray tube is the kinetic energy of the electron which is accelerated by an electric field,
Suppose photons are produced in a cathode ray tube (crt) from electrons which are accelerated across a potential of 24. 5 kv.
- (a)What is the maximum energy, in electron volts, of the photons?
The charge on one electron is 1.602×10⁻¹⁹. Thus, the energy,
[tex]E=(1.602\times10^{-19})(24.5)\dfrac{1eV}{1.602\times10^{-19}}\\E=2.45\times10^{4}\rm\; eV[/tex]
- (b) What is the maximum frequency, in hertz, of these photons?
The maximum frequency is,
[tex]f=\dfrac{E}{h}[/tex]
Here, h is planks constant. Put the values,
[tex]f=\dfrac{2.45\times10^4}{4.14\times10^{-15}}\\f=5.91\times10^{18}\rm\; Hz[/tex]
Hence, maximum energy, in electron volts, of the photons is 2.45×10⁴ eV and maximum frequency, in hertz, of these photons is 5.91×10¹⁸ Hz..
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