The velocity of electromagnetic waves in free space is 3 × 108 m / sec. The frequency of a radio wave of wave length 150 m, is

Question

The velocity of electromagnetic waves in free space is 3 × 108 m / sec. The frequency of a radio wave of wave length 150 m, is (A) 20 kHz (B) 45 MHz (C) 2 kHz (D) 2 MHz

Tardigrade Admin · Accepted Answer

Given: Velocity of electromagnetic waves in free space (v)=3 × 108 m / sec and wavelength (λ) =150 m . We know that frequency (f)=(v/λ)=(3 × 108/150) = 2 × 106 Hz =2 MHz

Q. The velocity of electromagnetic waves in free space is $3 \times 1 0^{8} m / sec$ . The frequency of a radio wave of wave length $150 m$ , is

20 kHz

45 MHz

2 kHz

2 MHz

Given: Velocity of electromagnetic waves in free space $(v) = 3 \times 1 0^{8} m / sec$ and wavelength $(λ)$
$= 150 m .$ We know that frequency $(f) = \frac{v}{λ} = \frac{3 \times 1 0 ^{8}}{150}$
$= 2 \times 1 0^{6} Hz = 2 M Hz$

Q. The velocity of electromagnetic waves in free space is 3×108m/sec. The frequency of a radio wave of wave length 150m, is