Electromagnetic radiation has dual character i.e. particle character as well as wave character. Name two phenomenon each to justify the particle and wave nature.

State True or False: If two particles have same KE the lighter particle has smaller wave length

The wave nature of electron was experimentally verified by diffraction of electron by Nickel crystal. An electron and a proton have same kinetic energy which of these particles has shortest de-Broglie wave length?

All moving matters posses both wave and particle nature. Name and write the expression which can explain the above statement.

Mention two observations which could not be explained by the wave nature of electromagnetic radiations.