Recent content by ABHoT

I suppore as both sticks can't occupy exactly the same space there would always be a slight diagonal for A --> D and C --> B meaning still the same speed for light throughout(?) but slightly longer times & distances than A --> B and C --> D.

so light from bulbs A and C WILL both reach D at the same time, and will both reach bulb B at the same time but slightly later? and if I measured the distance between A (or C) when the light started to separately B and D when the light reaches each resp., d/t will show the same speed for light...

I am thinking a clittle clearer now. I have two sticks in space with light bulbs on the ends, say bulbs A & B on one stick, bulbs C & D on the other. Both sticks are straight and are the same length. I hold both sticks upright, next to each other lining up bulbs A & C at the top and bulbs...

Thx. Forgive me if this is obvious: This sounds like it implies then that if observer or object A is moving towards observer (or object) B at speed x and object A turns it light on, the light will exceed the constant c and travel towards object B at speed x + c(?)

Be gentle, I have physics textbooks on order ;) which should satisfy my cravings, until then.. I would like to try and stick a pole-in-the-ground so to speak so I can say 'all movement is an offset from here'. I've read up a little on the Michelson-Morley experiment. I believe light...

Thanks, I will probably do that. I was scouring the web for black body radiation and got as far as the oven with a hole experiments. I understood the equality of emittance and absorption, but quite what is happening inside glass, metal and soot at the atomic/subatomic(?) level in each case will...

Aha, thanks. I think I'm confusing lumens/m^2 as a measure of electromagnetic energy. Is there an equivalent to lumens/m^2 for em energy?

Is there such a thing as lumens/m^3? Would you have to be measuring incoming light/energy from every (infinite) direction at the same time? Can it be estimated or got from lumens/m^2?

Ah, got it: c = wavelength.frequency. Still reading, Thanks

Thank you for sharing, and your time. I hope my continuing method of asking a bunch of questions and getting quick answers doesn't upset you. I appreciate your advice very much and the book reference. You have in fact presaged my next post: Can anyone recommend good books other than Brief...

Thanks for all the answers - I'm still reading. I'd like to also ask is the energy of a photon a constant? Is this Plancks constant? Are all photons equal? and what is wavelength if not the density of photons? Is it the density of something else?

Thanks for the answer. I think I'm missing something: If you heat an object energy emission increases. Mass is reduced by emmitance. Heating an object increases its mass. Am I mis-understanding what mass is? If all matter/mass gives off radiation/electromagnetic waves and emmitance...

If all parts of the colour spectrum move at speed c are the wavelengths of the very first outgoing light in sync/lined up?

Forgive my self-indulgent lack of proper vocabulary. Also my questions are a bit 101 and by #unlimited I should probably say infinite. Thanks in advance to anyone who has time. Do all parts of the colour spectrum (from the same source) move at speed c? Are all parts of the colour spectrum...

Is mass reduced by emittance? If so if you heat an object would its mass reduce quicker?