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Questions related from Fabrice Auzanneau
When we study general relativity and the effect of a mass on the structure of space, we often use a visual description such as this one : https://i.ytimg.com/vi/GJ20reLYfvQ/maxresdefault.jpg where...
05 February 2018 421 3 View
The photovoltaic effect makes it possible to take energy from the photons, and is a promising way of renewable energy generation. But, it doesn't work at night... On the other hand, neutrinos...
09 June 2017 4,407 17 View
When Einstein's general relativity theory predicted that light is bent in a gravitational field, Eddington verified that during a solar eclipse. He showed that some stars behind the sun were...
14 May 2016 2,673 33 View
Some astrophysicians say that gravitational waves (GW) were created during the inflation phase of the universe, when the universe was 10-36 second old and expanded billions of billions of billions...
20 March 2016 5,951 5 View
I have read the recent paper from Abbott et al about the recent discovery of gravitational waves by the LIGO experience. I'm wondering: if gravitational waves are an evidence of a change in the...
13 February 2016 6,408 21 View
Is it possible for a hacker to send signals so similar to those of a GPS satellite but carrying wrong information, so that a GPS receiver thinks he is in another place?
30 January 2016 1,835 4 View
Rod cells and cone cells in our eyes are visual photoreceptors in the retina that transform the visible light into nerve signals. Our perception of light is limited to what we call "visible...
23 July 2015 2,356 6 View
Passive radar is a quite recent technology that uses various existing EM emissions for Radar detection. It's usually used only for ground Radars. It provides very good performances for sthealthy...
13 October 2014 5,454 6 View
I recently read a paper saying that, apart from those coming from stars, supenovae, cosmic rays and nuclear power plants, the majority of all the neutrinos in our universe were created at the big...
20 September 2014 8,004 19 View
A very small dipole (very short compared to the wavelength) is equivalent to a capacitance. C_eq is equal to the half length of the dipole divided by epsilon_0 and by the logarithm of the ratio...
27 April 2014 8,116 0 View
Wouldn't it be possible to install (temporarily) a controllable semi-transparent screen between the sun and the earth to reduce the amount of energy (by a very small fraction) received on earth...
01 January 1970 1,988 6 View
In the not-too-distant future, most cars and trucks will be electric and autonomous. They will be connected to the road and infrastructure. This means they can be controlled remotely if...
01 January 1970 4,249 1 View
In a computer chess game, each piece is given a value (or a weight) to help quantify the strength of a move or a position. Typical values are : Queen-9, Rook-5, Knight and Bishop-3, Pawn-1, and...
01 January 1970 797 5 View
