Amplitude and energy relation in optics

In summary, the conversation is discussing the transmission coefficient for electric fields between two dielectric mediums with refractive indexes n1 and n2. The question is about the transmitivity of power from medium 1 to medium 2, which is calculated as n2/n1*t2. There is a question about whether it should be (n1/n2)2*t2, based on the definition of electromagnetic energy as n2E2. The concept of transmission coefficient is also explained as the ratio of transmitted intensity to total intensity, which is proportional to the electric field squared and electromagnetic energy.
  • #1
amir11
22
0
Hi Guys

I have a very simple and basic question. Assume interface of two dielectric mediums. If the t is transmition cofficient for electricfield from medium 1 to medium 2 with refractive indexs n1 and n2, what is the transmitivity of power from medium 1 to medium 2?

I know it is n2/n1*t2. But wouldn't you expect it to be (n1/n2)2*t2 because the elecromagnetic energy is defined as epsilone*E2 which is the same as n2E2?
 
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  • #2
From what I remember the transmition coefficient is defined as the ration of the intensity that is being transmitted to the total intensity and intensity is proportional to the electric field squared. Intensity is proportional to em energy. Does it make sense?

Cheers.Roman.
 

Related to Amplitude and energy relation in optics

1. What is the relationship between amplitude and energy in optics?

In optics, the energy of a wave is directly proportional to the square of its amplitude. This means that as the amplitude of a wave increases, its energy also increases.

2. How does the amplitude affect the intensity of light in optics?

The amplitude of a wave is directly related to the intensity of light in optics. As the amplitude increases, the intensity of light also increases, resulting in a brighter light.

3. What is the significance of amplitude in optics?

The amplitude of a wave in optics determines the brightness or intensity of the light. It also affects the strength of the electric and magnetic fields of the wave.

4. Can the amplitude of a wave in optics be negative?

Yes, the amplitude of a wave in optics can be negative. This indicates that the wave is inverted or reflected.

5. How does the amplitude of a wave in optics change as it travels through different mediums?

The amplitude of a wave in optics decreases as it travels through different mediums. This is due to the absorption and scattering of light energy by the particles in the medium.

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