Recent content by ThunderLight

Hi, I'm trying to rotate 2 different plotted circles in matlab, which have the Jet colourmap. Colormap has the Spinmap function, but when I use it, it only spins the Jet colormap in 1 circle, leaving out the other. I would like to spin the Jet colormap in2 different circles in opposite...

Aha, I understand you. Thank you very much Blue Leaf Very helpful to always remember that a phase shift of any multiple of ##\pi## will result in a linear wave.

What could be orthogonal physically, is not necessarily orthogonal to EM systems. So, what I mean here is whether an EM system would differentiate between the 2 waves, although they interfere with one anther? Or will their polarisations prevent this interference, and have the system see them as...

It seems to be linear (although I read a few days ago, that Vertical+Horizontal results in circular polarisation, so I may/must be wrong), but I will need to brush up on the mathematical representation of the circular and elliptical waves. I haven't done physics for a long time, so I appreciate...

I've been trying to get my head around Polarisation and how it achieves orthogonality. I'm not sure if this should be in Physics or Electrical Engineering Section. (Mods can move this where appropriate) I know that 2 EM wave with linear polarisations where one wave is shifted by π, they would...

The thing that confused me was the fact that this Phenomena is usually expressed from the point of view of "Obstacles" and "Slits", while I'm speaking of "Free Space" and "No Obstacles". But, if the Antenna itself that radiates the beam would be considered like that slit, where radiation is...

Why do longer wavelengths spread out more than shorter wavelengths? What is the physics principle/law which explains why radio waves spread out more than optic waves in free space?

If general relativity in the formal sense constrains all velocities to the speed of light as a maximum, how would superluminal group velocities exceeding speeds of light (at their superpositions) be evaluated in mainstream physics? Would this be a case of General Relativity and Physics...

I mainly get text from research repositories related to university, that's why it may not be accessible if I link to papers in journals like I previously did. There are general papers available on google though. I will try to gather some links and post them. They are mainly around Crystals and...

This question is speaking purely of the Acousto optic effect in lasers and solids. Not liquids. I see most research deals with the light as a whole and not the subsequent frequency components (separate colors) of light.

Would the Acousto-Optic effect be different for different colours of light or rainbow? Or it would treat all wavelengths of light in a white beam the same? Would one colour witness a greater acousto-optic effect than the other? Please explain. Thank you.

It is usually referred to as Phonons for sound waves in solid. But, where it gets confusing, is in gases and air. Some still call it Phonons, others say, Phonons can only be used in solid states. So what is the Quantum of Sound in Gases/Air? And if possible, refer to any text which speaks of...

The conclusion of the paper says: "Sound pressure was able to be measured by a laser doppler velocimeter through the optical phase modulation due to the acoustic-optic effect of air" So it's not so insignificant as to not cause any phase change. But perhaps not strong to influence the frequency.

That's what I originally thought. However, an IEEE paper and other papers did experiments on the interaction in air. So this further confused me. - For those who can't access the paper in IEEE - It is a paper which reports the measurements of Sound Pressure via the acoustic-optic effect in air...

If concert environments are saturated with sound, why don't we witness a change in light colours (frequency shift) or reflection or any other effect witnessed in laboratory experiments documenting acoustic-optic effects?