What is photon?

What are photons? Give its two properties.

What are Photons? Give its two properties.

Maximum kinectic energy of an emitted photon by a photo cell is 2eV. What is stopping potential?

A hot metal emits photon of light with energy 3.0 (10*-19) J. Calculate the frequency and wavelength of the photon ?

Prove that a photon at rest has no mass.

What is the number of photon of light with a wvelengthof 4000 pm that provide 1 J of energy ?