Physics 60 Optics: Double Slit Interference (6 of 25) How to find the Electric Field Strength

[@KorawichKavee]

not so many youtube education channel go deep to detail about intensity of interference light , thanks

[@valeriereid2337]

You will not find this in a textbook and chances are that the in class professor will not explain it well. Many thanks for not missing a step with the trigonometry, Professors van Biezen.

[@MichelvanBiezen]

You are welcome.

[@hamorabi8]

Thanks very much for uploading this video.

[@CatsBirds2010]

Great teaching

[@nicolasoche7993]

Hi Michael. I'm a physics student from Spain. What's the Erms? I don't understand what does it mean and what differenciates it from E0.

[@MichelvanBiezen]

Hi and welcome to the channel. E rms is the "root mean square" value of the Electric field oscillations. (It is also known as the "effective" strength of the electric field.) E max is the maximum value of the oscillation. Io is the maximum intensity of the pattern formed by a double slit.

[@nicolasoche7993]

@@MichelvanBiezen you are the best. Thank you for answering so quickly lol

[@kjh0121ind]

thank you

[@Peter_1986]

1:59 "Let's go Power"! =D

[@jacobvandijk6525]

In video (5 of 25) you said that the INTENSITY is equal to the average of the P.VECTOR. In this video (6 of 25) however you say the average of the P.VECTOR is equal to the AVERAGE intensity. Isn't there a difference between INTENSITY and the AVERAGE INTENSITY???

[@MichelvanBiezen]

Sjaak van Dijk When we talk about the intensity of light (or any electromagnetic radiation) we almost always mean the average intensity (or the root-mean-square or effective intensity). Since light is a wave, the intensity goes from max to zero to negative max etc. In some cases they will talk about peak intensity, but in everyday use, that is not very useful.