Explain the particle nature of electromagnetic radiations .

What are various ranges of electromagnetic radiation ? Explain the characteristics of electromagnetic radiation.

Explain the wave nature of light.

Explain the acidic nature of phenol.

Particle nature of electron is proved by

If the wavelength of an electromagnetic radiation is 2000 A. what is its energy in ergs?

Show that the wavelength of electromagnetic radiation is equal to the de Broglie wavelength of its quantum (photon).