Re: LIGO

2019-03-31 Thread John Clark
On Sun, Mar 31, 2019 at 5:06 PM Lawrence Crowell < goldenfieldquaterni...@gmail.com> wrote: >> Yes but LIGO detects the peak to peak displacement of a wave not its >> power or energy as cameras and radios do. And that means LIGO's ability to >> detect wave producing things is reduced with

Re: LIGO

2019-03-31 Thread Lawrence Crowell
On Sunday, March 31, 2019 at 8:23:02 AM UTC-6, John Clark wrote: > > On Sun, Mar 31, 2019 at 8:43 AM Lawrence Crowell > wrote: > > >> > An antenna or any receiver of electromagnetic waves in effect measures >> the displacement of electrons or equivalently a current is produced. >> > > A radio

Re: Energy efficiency of different programming languages

2019-03-31 Thread Philip Thrift
On Sunday, March 31, 2019 at 11:58:46 AM UTC-5, Bruno Marchal wrote: > > > On 30 Mar 2019, at 07:15, Philip Thrift > > wrote: > > > > > https://thenewstack.io/which-programming-languages-use-the-least-electricity/ > > Which language one uses makes a physical difference. > > > That is correct,

Re: LIGO

2019-03-31 Thread John Clark
On Sun, Mar 31, 2019 at 8:43 AM Lawrence Crowell < goldenfieldquaterni...@gmail.com> wrote: > > An antenna or any receiver of electromagnetic waves in effect measures > the displacement of electrons or equivalently a current is produced. > A radio receiver detects the power in a AC circuit, and

Dark Matter

2019-03-31 Thread John Clark
A second galaxy has been found that contains no Dark Matter. These odd galaxies are about the same size as our Milky Way but contain 200 times fewer stars. They pretty much rule out the idea that Dark Matter doesn't exist and our laws of gravity just need to change because unlike every other

Re: Energy efficiency of different programming languages

2019-03-31 Thread Bruno Marchal
> On 30 Mar 2019, at 07:15, Philip Thrift wrote: > > > > https://thenewstack.io/which-programming-languages-use-the-least-electricity/ > > > Which language one uses makes a physical difference. That is correct,

Re: LIGO

2019-03-31 Thread Lawrence Crowell
On Saturday, March 30, 2019 at 8:32:53 AM UTC-6, John Clark wrote: > > On Fri, Mar 29, 2019 at 8:05 PM Lawrence Crowell > wrote:\ > > >> > Weak gravitational waves are very similar to electromagnetic waves, >> > > From a practical point of view there are 2 differences: > > 1) Our ability to