Recent content by Roy Edmundson

I think the last 2 posts by f3nr15 are explained by his misinterpretation of what he was looking at. I suspect he thinks it is just one graph he's looking at wherase it is two that are superimposed using the same set of coordinates. One for the electric field and another for the magnetic field...

Microwaves consist of a stream of photons, just like light or X-rays, but with a very much lower frequency of oscillation. All these are collectively described as electromagnetic radiation, and also include radio waves which are at even lower frequencies. This is because there is both an...

Thanks Pervect. I visited the link you quoted and read it all. Presumably the non-application of the Schwartzchild radius to rapidly expanding matter also applies the other way round? Suppose we organised 1/2 the matter in the universe to converge on a point in space with no prior...

The Whole Universe Must Be A Black Hole The Big Bang Theory has the whole universe expanding from an initial size considerably smaller than an atoms nucleus. The universe at this stage must have all been inside a black hole with an event horizon radius of many light -years. How is it that...

Hi everyone, Have any of you tried a CD or DVD recordable blank in the microwave? Its quite spectacular. The thin backing layer of evaporated aluminium only a few tens of atoms thick must be considerable thinner than the skin depth (If anyone really wants I can do the arithmetic and tell...

Antoker needs some glasses - the required pulse are 1/100th millisecond. Not 1/100th microsecond. This pulse rep rate is comfortably within the capabilitiy of the standard 555 timer circuit which is good for 300KHz. For a data sheet look up NE555. You shouldn't have any trouble finding...

Lets look at the situation with carbon based life as we know it. There are complicated molecules for storing genetic information (DNA), mechanisms to translate this information into structural molecules, enzymes and hormones(proteins) and biochemical pathways to store produce and use chemical...

Synthetic diamond scalpel blades are commercially available and well liked by surgeons. Contrary to what you might think they stay sharp much better than steel and chipping doesn't seem to be a problem. Quoted sharpness is 3 nm and achieved with plasma polishing. This is like 30 atoms wide at 1...