For example, lasers can be used harmlessly for determining distances in space and gathering information on objects in space, as well as for beaming communications back to earth, but also can be used as weapons.
And to quote his biography, Among his discoveries are the fluorescent light, laser beam, wireless communications, wireless transmission of electrical energy, remote control, robotics, Tesla's turbines and vertical take off aircraft.
And 500 fewer kilometers means there will be less spreading for beam-based communications, as well.
So any neutrino communications beam would have to be hugely powerful and any neutrino detector extremely big.
"Tesla was an inventor in so many different realms — aircraft design, robotics, beam weapons, mass communications — that he's an inspiration for what true genius really is".
Electro-optical modulators are used for modulating or encoding information on laser beams in laser communications systems.
In earlier work, Richard Woo of the Jet Propulsion Laboratory in Pasadena, California, and collaborators had probed for the source of the slow wind by monitoring the communications beams of interplanetary spacecraft as they dipped behind the sun.
Liquid crystal (LC) optics can provide a compact and low-power solution to beam control in laser communications systems.
A final challenge in satellite communications is beam acquisition, pointing, and tracking.
Except in satellite-to-satellite communications, laser beams are transmitted via optical fibres.
