The wavelength of an electromagnetic wave can vary depending on its frequency and the properties of the medium through which it is propagating. In a vacuum or air, electromagnetic waves, including visible light, radio waves, microwaves, and X-rays, all travel at the same speed, which is approximately 299,792,458 meters per second (denoted as the speed of light, c).
To calculate the wavelength of an electromagnetic wave in a vacuum or air, you can use the following formula:
wavelength (λ) = speed of light (c) / frequency (f)
Here, the speed of light is approximately 299,792,458 meters per second.
For example, if you have a radio wave with a frequency of 100 megahertz (MHz), you can calculate its wavelength as follows:
λ = 299,792,458 meters per second / 100,000,000 hertz
λ ≈ 2.9979 meters
So, in this example, the wavelength of the radio wave would be approximately 2.9979 meters.
Keep in mind that the wavelength of an electromagnetic wave can vary depending on the medium it is passing through, as different materials can affect the speed of light. In a medium other than a vacuum or air, the speed of light may be different, and therefore, the wavelength will also be affected.