Hi,I was hoping to find someone who knew a little something about transducers. I need help answering the following two questions: 1. What is one transducer used to produce light, how does it work and what domains does it convert between? 2. What is the transducer in a smoke detector and what domains doe sit convert between.
Some of the best explanations for this are in the very same book. The rubber-sheet analogy for spacetime is pretty effective. The term straight line as used here is a generalised concept extrapolated from our understanding of what straight means to us. This generalised term falls under the definition of a geodesic. Think of this: A geodesic over the surface of the Earth is the shortest (or longest) path between two points on it's surface. It is the straightest line we can get without leaving the surface, but it's not straight compared to a path drilled *through* the Earth from one point to the other. The described path on the Earth is restricted by Earth's geometry, by it's curvature. By asserting that spacetime is in some sense analogous to this and that it's geometry (specifically curvature) is altered by the presence of gravity, we can imagine spacetime as a flat rubber sheet that is cured (or warped) by the presence of heavy masses resting on it. Any other particles moving across this sheet will change their path as they approach the curved spacetime as they follow their geodesic path. It is often pointed out that we use the idea of masses on a rubber sheet being acted on by gravity to provide an analogy for how gravity itself affects spacetime. Attempting to picture 4d spacetime is a somewhat futile endeavour, however we can often suppress one or two spatial dimensions and treat time as an additional space dimension. We do have to be careful how we visualise distance in spacetime, though, because time doesn't behave like a spatial dimension as we understand them. Thats about as far as I can go without breaking out the maths.
All components and equipment are designed differently. The TV is a little unique it requires very hi voltage for the picture tube. and the rest requires a much lower voltage. plus the TV requires a cable feed and is also plugged into the wall. If lightening strikes the TV cable outside, all that energy has to find a path to ground, sometimes this path can be through the TV cable through the electronics inside your TV to the power plug to the wall, which has a ground ( do not remove the ground, it will make it worse) This is one possibility of what happened. You should check the, or ask the cable company to check their TV cable, and ensure it is properly grounded. but even if it was grounded properly, it will help , it is still not 100%, a direct hit will still take it out. Best bet is to disconnect all electrical appliances during a lightening (thunder) storm. This happened to a number of co-worker, they were working on a highway, resting on a metal guard rail, that runs the stretch of highway, about 5 kilometres. in the distance was thunder storm, all of a sudden the co-workers sitting on the guard rail jumped off the guard rail. Apparently lighting struck the rail a few kilometres down the road, even though there are grounding points along the way, there was enough electricity to give all the workers a small shock.
