More wavelenght has an electromagnetic wave the minus frequency

In summary, electromagnetic waves have a relationship between their wavelength and frequency due to the constant velocity of light. This is not experimental, but rather based on definitions. The frequency of a wave is measured in cycles per second and the wavelength is the distance between successive peaks. The most common method to measure light wavelength is to use a dispersive element or a Fabry-Perot cavity. Electromagnetic waves are not formed by electrons, but rather photons which oscillate in a specific pattern as they propagate through space.
  • #1
scientifico
181
0
Hi,
i read the more wavelenght has an electromagnetic wave the minus frequency it has, but how is possible to prove that?
what experimenst were done?

Thanks!
 
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  • #3


what exactly is the frequency of a wave?
 
  • #4


Frequency = cycles per second (units, Hz = 1/s).
Wavelength = distance between successive peaks (units, m).

Then by definition, Velocity = Wavelength x Frequency.

If velocity is constant (as in the case with EM waves), then as wavelength increases, frequency decreases and vice-versa.

Claude.
 
  • #5


scientifico said:
what exactly is the frequency of a wave?

Think of a wave in water. If there are many waves passing a certain point per second then the frequency is higher than if there are fewer waves passing that point. Wavelength is the distance between those waves. If you lower the wavelength, IE shortin it, then the frequency will increase because there are more waves. And vice versa. Amplitude is how high the waves peaks are. Look up wavelength and such on wikipedia.
 
  • #6


ok, thanks!
how is possible measure so exactly the light wavelenght?
 
  • #7


The most common method is to shine the light on a properly calibrated dispersive element (such as a prism or grating) and measure the deflection of the beam. Commercial optical spectrum analysers (OSAs) use this principle. Alternatively, you can use a Fabry-Perot cavity and measure the transmission with respect to the reflector spacing. This method typically has higher resolution, but a lower (free) spectral range.

Claude.
 
  • #8


is there a why that electromagnetic waves do "up and down" in vacuum istead of simply going straight?
electromagnetic waver are only formed by electron, right?

thanks!
 
  • #9


is there a why that electromagnetic waves do "up and down" in vacuum istead of simply going straight?
electromagnetic waver are only formed by electron, right?

thanks!
 
  • #10


scientifico said:
is there a why that electromagnetic waves do "up and down" in vacuum istead of simply going straight?
electromagnetic waver are only formed by electron, right?

thanks!

Electromagnetic waves are Photons, not electrons. All light is an electromagnetic wave. As is all x-rays, gamma rays, microwaves, radio waves, infrared waves, ETC. The only difference in any of them is the frequency.

And you are misunderstanding how an EM wave works. It doesn't MOVE up and down, it oscillates up and down in one field, and side to side in the other field as it propegates in a direction. The overall MOVEMENT of the wave/photon is straight. Do not think of it as a particle that moves up and down in a wavelike manner as it propegates through space.

See http://en.wikipedia.org/wiki/Electromagnetic_radiation for more info.
 

1. How does the wavelength affect the frequency of an electromagnetic wave?

The wavelength and frequency of an electromagnetic wave are inversely proportional. This means that as the wavelength increases, the frequency decreases, and vice versa. This relationship is described by the formula: c = λν, where c is the speed of light, λ is the wavelength, and ν is the frequency.

2. What is the relationship between wavelength and energy in an electromagnetic wave?

The energy of an electromagnetic wave is directly proportional to its frequency. This means that as the wavelength decreases, the frequency and energy of the wave increase. This relationship is described by the formula: E = hν, where E is energy, h is Planck's constant, and ν is the frequency.

3. Can a longer wavelength have a negative frequency in an electromagnetic wave?

No, the frequency of an electromagnetic wave cannot be negative. Frequency is a measure of the number of complete cycles of the wave that occur in one second. It is always a positive value, regardless of the wavelength.

4. How does the wavelength and frequency of an electromagnetic wave relate to its position on the electromagnetic spectrum?

The electromagnetic spectrum is a range of all possible wavelengths and frequencies of electromagnetic radiation. The longer the wavelength, the lower the frequency and the lower the energy of the wave. Similarly, the shorter the wavelength, the higher the frequency and the higher the energy. Visible light, for example, has a shorter wavelength and higher frequency than radio waves, making it more energetic.

5. What is the significance of the wavelength and frequency of an electromagnetic wave in different applications?

The wavelength and frequency of an electromagnetic wave determine its properties and interactions with matter. For example, longer wavelengths such as radio waves are used for communication, while shorter wavelengths like X-rays are used for medical imaging. The energy and frequency of an electromagnetic wave also play a role in its ability to penetrate different materials and cause various effects.

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