question_answer

A T.V station transmits waves of frequency 200 MHz. Calculate the wavelength of the waves, if their speed in air is\[\text{3}.0\times \text{1}{{0}^{\text{8}}}\text{ m}{{\text{s}}^{-\text{1}}}\].

Answer:

Given, \[n=200\text{ }MHz=200\times {{10}^{6}}Hz\] \[v=3.0\times {{10}^{8}}m{{s}^{1}}\] \[\lambda =?\] We know                             \[V=n\lambda \] \[\Rightarrow \]\[\lambda =\frac{v}{n}=\frac{3\times {{10}^{8}}}{200\times {{10}^{6}}}=1.5m\]