Question

the frequency of electromagnetic wave which has wavelength 30 cm and velocity 3 X 10(power8) m/s is :​

Answer 1

$\huge\mathfrak\blue{Answer :}$

$<b><I>Given,$

Wavelength = 30 cm = 0.3 m

Velocity = 3 × 10^8 ms^-1

Now, Through Wave Equation

Velocity = Frequency × Wavelength

3 × 10^8 = f × 0.3

3 × 10^8/ 0.3 = f

1,000,000 = f

Thus, Frequency = 1,000,000 Hz = 1000 khz.