Question

Wavelength of the wave with $30MHz$ frequency is

• A. 1 cm
• B. 10 cm
• C. 100 cm
• D. 1000 cm
• E. 10000 cm

Answer 1

Answer: (D)

Given,
frequency $v=30MHz$
$=30\times 10^{6}Hz$
We know that, $c=v\lambda$
$\lambda =\frac{C}{v}$
$c=3\times 10^{8}m/s$
$\lambda =\frac{3\times 10^8}{30\times 10^6}=10m=1000cm$