sevensages's latest activity

Imagine a straight piece of string. You can shake one end of it to get waves travelling along it. You can measure the distance between...

Adding to the above, for something like the CMB fluctuations, it's far better to talk about their angular scale than about their size in...

No. First of all, I am guessing that you mean page 71. Page 72 does not even have the word maps or map on it. Neither page 71 nor...

Does not the first paragraph on page 72 explain the monopole as being the size partitions into which the map is broken up ie if the map...

@jefferywinkler3

@berkeman you are knowledgeable about physics . What is your opinion on this?

Here is some context. This is pages 71 and 72

Yes. And the traveling waves would need to meet up with the wave generation source in phase in order to add constructively.

When you say that the sine waves need to be in phase, do you mean that the sine waves have to have the same wave length with the crest...

I just finished reading Max Tegmark's book Our Mathematical Universe. There is a diagram on page 72 of Our Mathematical Universe that I...

That is kind of the thesis of the book Our Mathematical Universe.

Flow of electrons (or of charge in general) is called current, which is different from volatge. You need charges to generate an EM-wave...

One thing, because I think that is your main issue - voltage is not a property of electrical current per se (e.g. flow of electrons in...

I'd prefer to say it includes an electric field, but "has voltage" will do, yes. Do note @weirdoguy's comment in #9, though. Although...

Here's an orange circle with a green wave: In places the green wave is outside the orange circle, in places it's inside. You can think...