Question

To which region of electromagnetic spectrum, the frequency $1GHz$ corresponding?

• A. Ultraviolet rays
• B. Radiowaves
• C. Visible radiation
• D. X-rays

Answer 1

Answer: (B)

$n=1GHz=10^{9}Hz$
$\therefore \lambda =\frac{c}{n}=\frac{3\times 10^8}{10^9}=\frac{3}{10}$
$\Rightarrow \lambda =0.3m=30cm$ (radiowaves)