The number of colours in rainbow

A vibrating charge produces ……………

Electromagnetic wave travels with a speed of …………….

The distance between two successive peaks of a wave is ……………

The relation between frequency and wavelength of electromagnetic wave

Formation of rainbow is example of …………….. spectrum.

$V=\nu \lambda V\; =\; \backslash nu\backslash lambda$, is applicable for……………

Red has …………. wavelength and …………. frequency.

Quantum theory was proposed by……………

Planck’s equation is ………...