Different kinds of electromagnetic radiations are simply electromagnetic waves with different
(i) wavelengths (ii) frequencies
(iii) speeds

Options

A. `(i),(ii),(iii)`
B. `(i),(iii)`
C. `(ii),(iii)`
D. `(i),(ii)`

Answer

D

Explanation

Electromagnetic waves travle at a speed of `3.00 xx 10^(8)m s^(-1)` (rounded off) or `186,000 `miles per seond, which is the speed of light in vacuum. This speed does differ from one medium to another, but the variations are insignificant for our calculations. By convention, we use the symbol `c` for the speed of electromagnetic waves, or as it is more commonly called, the speed of light.