Question

What is the wavelength of the wave whose frequency is ${10}^{12}Hz$?

• A. 0.3
• B. 0.4
• C. 0.5
• D. 0.6

Answer 1

The correct option is A 0.3

$C=v\lambda$
$\lambda =\frac{c}{v}=\frac{3\times {10}^8}{{10}^{12}}$
$=3\times {10}^{-4}m$
$=0.3\times {10}^{-3}m$
$=0.3mm$