Question

Type a few lines about energies of electromagnetic waves (at least 50 words) and (at least 100 words) on laws of reflection, laws of refraction, rainbow, and images formed in lenses.

Answer 1

Solution: - Energies of electromagnetic waves. The energy in an electromagnetic wave is tied up in the electric and magnetic fields. An electromagnetic wave has both electric and magnetic fields, so the total energy density associated with an electromagnet is U. For an electromagnet wave the energy associated with the electric field is equal to energy associated with the magnetic field, so the energy density can be written in terms of just one or the other. Laws of reflection: The las governs the reflection of light rays off smooth conducting surfaces, such as polished metal or metal coated glass mirrors.