# How do you calculate the speed of an electromagnetic wave?

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The speed of a wave is a product of its wavelength and frequency. Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa. This relationship is represented by the equation: Speed = Wavelength × Frequency.

## How do you calculate the wavelength of an electromagnetic wave?

How to calculate wavelength

1. Determine the frequency of the wave. For example, f = 10 MHz . …
2. Choose the velocity of the wave. …
3. Substitute these values into the wavelength equation λ = v/f .
4. Calculate the result. …
5. You can also use this tool as a frequency calculator.

## What is speed in waves?

In the case of a wave, the speed is the distance traveled by a given point on the wave (such as a crest) in a given interval of time. In equation form, If the crest of an ocean wave moves a distance of 20 meters in 10 seconds, then the speed of the ocean wave is 2.0 m/s.

## What is the speed of an electromagnetic wave in air?

All these waves propagate in vacuum with the same speed c, the speed of light. The speed of light in air (at standard temperature and pressure) is very close to the speed of light in vacuum (the refractive index of air, n, is 1.0002926, meaning that the speed of electromagnetic waves in air is c/n ≈ c).

## How do you find frequency when given wavelength and speed?

Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v/f.

## How do we find speed?

The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time.

## What is the speed of a water wave of frequency 2?

What is the speed of a water wave of frequency 2 Hz and wavelength 1.5 m? v = f λ = 2 H z ⋅ 1.5 m = 3 m s .

## How do you calculate the speed of a water wave?

Count the number of waves passing a point in ten seconds then divide by ten to record frequency. Calculate the speed of the waves using: wave speed = frequency × wavelength.