Recent content by patjk

How does the computer trigger what color needs to be shown in which location at any given time?

Great info, thanks. Do LED monitors use the same type of setup as an LCD (as you discussed above)? For LCD, can 1 pixel put out more than 1 color (like a gradient for example. I assume not, but curious if so)? And how are each pixel lit (what provides the light source, is it just a small bulb?)?

Great, thanks. What in a LED monitor causes the colors to appear? Cheers.

How many LED's are in a typical LED monitor? For example, how many in a 20in vs. in a 24in, etc? Thanks

In addition to the question above, what significance would an antenna traveling across water have on the wave? would the water absorb some of the wave instead of reflecting it, causing the signal to weaken? Cheers!

I understand a plane wave doesn't bounce off the sides of the waveguide. But can't it still propagate down a metallic waveguide, nonetheless? Cheers!

Explain why a plane electromagnetic wave cannot propagate through a metallic waveguide. I've tried to come up with an answer, but I haven't been able to. I thought metallic waveguides were good since they reflected the propagating wave very well, allowing the wave to move without much loss...

They are homework problems (hence why it is posted in the homework section of the forum), from various different areas of the module, hence why I said general questions. Sorry for not making that more clear.

Homework Statement These are some general questions I have, related to an old assignment I am looking at. 1) Discuss the applications of polarisation in: a. radio transmission across water b. broadcast TV transmission c. satellite communication 2) Explain why a plane electromagnetic...

Thanks for the detailed explanation. That certainly helps answer my question. For the bold text, what exactly is the signal that is traveling fast? Are they waves of some sort?

Ah. Assuming a is the beginning of a wire and b is the end of the wire, do all the electrons alternate between a and b, or just some? And for DC, the current continues just from a to b, and all the electrons move from a to b, correct?

If you have a wire, and we are looking at it like this with current flowing to the right: ---------a>--------------------b>----------------------------->c Are the electrons moving through the wire by going from a to b, b to a, a to c, etc. as they move along the wire? If so, why exactly are...

What really is a sinusoidal wave current? What exactly is happening to the electrons that is different from a DC? Are there any readings you suggest that will give me more insight into this? Thanks in advance.