Question

A photon, an electron and a very small unknown particle have the same wavelength, The one with the most energy

• A. is the photon
• B. is the electron
• C. is the particle nucleus
• D. depends upon the wavelength and the properties of the particle.

Answer 1

The correct option is A is the photon

Energy of photon, $E_P=\frac{hc}{\lambda }$

Energy of electron $E_e=\frac{h^2}{{\left(2m\lambda \right)}^2}$

So, we can conclude that electron has greater mass, hence it possess less energy although having same wavelength.

A photon has more energy