Recent content by ohadohad2

Hello all, I'm trying to calculate the effects of losses on the behavior of refraction through a prism. Now in the regular lossless case everything is easy and known, in the case where the prism is lossy my refraction angle at the first boundary is complex and this makes it much harder to...

Also if I remember correctly RF antenna's are very inefficient and transform about 5% of the energy into RF wave.

Frequency = energy of a single photon = the energy an electron needs + get when he is existed. What this means is that if the work function is 1ev and you have a photon hitting the substance with 2ev then an electron will be released with 1ev of kinetic energy. Intensity= the rate of which...

You can enter nanotechnology from electrical or materials engineering too.

LOL not a rabbit, I was actually at a beach with two bi sexual friends (females) of mine, while they were doing their thing a few feet next to me I was starting at the stars, which I haven't seen in a LONG while since I live in a city and started pondering about that lol. Anyway, rocket fuel...

First and foremost I did say I'm not an expert in physics and this is just the most general description and thesis to such propulsion. Forgive me but I don't see where I break the law of energy conservation? I'm assuming the vehicle will have a power source that will supply energy to the...

Well if so, than we theoretically found a way to create a gravity propulsion engine...not an efficient one...but still :) Just think of a similar structure to a fusion reactor where they concentrate many laser beams on a single spot , if you take a spaceship and have a laser array that all...

Hmmm well this sounds a bit out of my knowledge but if I think I understand you right then by focusing at one point a very strong electromagnetic wave such as a laser beam (or more precisely many lasers beams that will all reach that point in the same positive phase) will create a gravity field...

First please bare with me, I'm not close to being a physicist. So if I combine E=m*c^2 and that mass creates gravity, I conclude (probably wrongfully) that with enough energy concentrated at the same point we can generate a noticeable gravity field. Now I know that it will require HUGE...

I didn't read all the thread so excuse me if I repeat something someone else said. By holding the ball you DON'T DO WORK BUT you DO "SPEND" ENERGY. Its exactly like an car with automatic gear on a slop, it standstill but the engine is still running and create torque on the wheels but there...

You miss the point,forget about a black hole.Just imagine you got a gravity vector as strong as the one emited from a black hole and a light beam that is traveling in the oposite direction that feels its effect,its not a word paradox its a physics one :) But you guys really helped me,and once...

I see I got a lot of reading to do :)

I see some of you didnt actualy read my post.I specificly said that we are assuming that the gravity vectors are exacly radials (for example like the E of a sphere electrical charge) and that the light is traveling excaly against the direction of a singal vector. mr.vodka got what I am...

Ok I got a question. So we know that in space light travels at a constant speed of 3X10^8m/s. We also know that light can't escape a black hole gravity field. So let's assume I got a light source just near a black hole (lets assume the gravity field is radial) ,my light source is...

You feel whatever your nerves react to,which is 99.99999999% force.Since you arent a ferromagnetic material you need a STRONG magnetic field to have a noticeable force on you.So that's why you don't feel it. Also a magnetic field can create currents and charge accumilation,but on a dielectric...