Large Scale (~25 m^2) metal diffraction grating of submicron period as possible optoelectronic detector for short scalar gravitational waves

A method of detecting of short scalar gravitational waves with a wavelength of ~ 0.5 micrometers is proposed, in contrast to LIGO Project, aimed at detecting of long quadrupole gravitational waves with a wavelength in interval from 43 till 10000 km. The conduction electrons in a metal are proposed to use as gravitational receiving antennas (pendulums) instead of massive mirrors in LIGO. It is shown that using a Large Scale metal diffraction grating with area of 25 m^2 you can convert the mechanical vibrations of the conduction electrons of metal into a plane electromagnetic wave propagating along the normal to the grating. It is shown that when the amplitude of the scalar gravitational wave in a source (in quasar at the centre of our galaxy) is greater than Ag0 = 10^20 cm/(s^2), you can register it with the help of a large optical telescope equipped with the proposed diffraction grating. It is shown that the special theory of relativity allows the amplitude of the scalar gravitational waves in this source by 5 orders of magnitude greater than the above-mentioned minimum value.

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