New answers tagged

2

Unless I've done my maths wrong, the period of total eclipse is about 18 seconds. The CHIMERA camera at Mt Palomar, the instrument which followed up the discovery of this system, can take exposures at up to 8 full 1k$\times$1k frames/second and considerably higher if windowed on an object. There is no need for photon-counting equipment for such a slowly ...


0

It looks like @planetmaker's suggestion of using WSL will work. On my Windows machine I've had Ubuntu 18.04 installed for a while, so have tested using that; but this should work with the latest version of Ubuntu as well. Here goes: Start Ubuntu from the Windows Start Menu In the Ubuntu terminal window which appears, type sudo apt install iraf The sudo ...


1

What is the gain of a telescope? I'll answer this from a different perspective. The gain of an antenna such as a radio telescope can be defined as the ratio over the gain of an isotropic antenna. For example, a simple, bare, half-wave dipole has a gain of 1.6 dBi over isotropic. From this answer to Quantitatively, why will optical communication be better ...


2

Gain in electronics can have different meanings: Gain is a measure of the ability of a [...] [device] to increase the power or amplitude of a signal from the input to the output port. [...] The term gain alone is ambiguous, and can refer to the ratio of output to input voltage (voltage gain), current (current gain) or electric power (power gain). For ...


Top 50 recent answers are included