Question

The speed of an electromagnetic wave is a constant, 3.0 × 108 m/s. The wavelength of a wave is 0.3 meters. What is the frequency?

Answer 1

Frequency should equal 10^9 /s

Answer 2

Answer:

The frequency is 1*10⁹ Hz

Explanation:

The question is incomplete. The correct question is with the following options:

"The speed of an electromagnetic wave is a constant, 3.0 × 108 m/s. The wavelength of a wave is 0.3 meters. What is the frequency? A. 9.0 × 10⁸ Hz B. 1.0 × 10⁹ Hz C. 1.0 × 10⁹ Hz D. 9.0 × 10⁷ Hz"

The wavelength is the minimum distance between two points of the wave that are in the same state of vibration.

Frequency is the number of vibrations that occur in a unit of time.

The speed of propagation of a wave is the magnitude that measures the speed at which the disturbance of the wave propagates along its displacement. Relate wavelength (λ) and frequency (f) inversely proportionally using the following equation:

v = f * λ

Then:

$f=\frac{speed}{wavelenght}$

In this case:

$f=\frac{3*10^{8} \frac{m}{s} }{0.3 m}$

Finally:

f=1*10⁹ Hz

Then the frequency is 1*10⁹ Hz (Option C)