Question

TV waves have a wavelength range of 1-10 meter. Their frequency range in MHz is

• A. 30-300
• B. 3-30
• C. 300-3000
• D. 3-3000

Answer 1

The correct option is A

30-300

$v=\frac{C}{\lambda }\Rightarrow v_1=\frac{3\times {10}^8}{1}=3\times {10}^8$ Hz=300 MHz
and $v_2=\frac{3\times {10}^8}{10}=3\times {10}^7$ Hz=30 MHz