11/6/2023 0 Comments Moon reflector![]() In reality, the laser beam arrives very diffracted on the moon and strikes it on an area of more than a square kilometer if a reflector exists in this area, it will represent an extremely small portion of it, and so it will contribute very little to the reflected signal, even if it reflects it very well. Given the size of the retroreflector, most of these points can only come from the lunar surface, which proves it is able to send back the laser beam. We can see that there is a cloud of points on a difference of distance which spans on 120 nanoseconds, which represents 18 meters. ![]() The progress which has been made on the laser only allows to measure with more precision the distance that the laser travels, but not the localization and the size of the target which is struck by the laser beam. It is impossible to determine the size of the surface which sends the laser beam back from the received echo, ONLY ITS DISTANCE! We can see that there is a horizontal bar of photons which is more dense for a given value of the vertical coordinate than for the other values of this coordinate, and that this bar is in a "width" of around three nanoseconds it means that the best reflection is in a range of less than 45 centimeters that doubtlessly means that the laser beam has met a reflective surface which sends back the beam fairly well.īecause the detection is concentrated in a range of around 45 centimeters, and that the size of the reflector is compatible with this range, the Apollo believers think that it proves that the laser beam has bounced on the retro-reflector, but it is completely wrong: This range represents a variation of distance, and not the width of the surface which is struck by the laser beam and sends it back! In a nanosecond, the lights travels 30 centimeters (the light speed is 300,000,000 m/s), but, as the laser must make a double travel to go to the moon and back, this distance must be divided by two so a nanosecond corresponds to a variation of distance of 15 centimeters. The horizontal coordinate represents the duration of the measure, and is in minutes. The points represent the detection of photons the vertical coordinate represents the difference of time of reception of the signal, and is graduated in nanoseconds. This is the graph of points returned from the moon. Is the beam was arriving on the moon as concentrated as the reflector's surface, searching the reflector would be a true nightmare and would take an eternity, given the great search surface (in two dimensions!), for the retro-reflector would hardly represent a ten millionth of the search area.Īnd, even if the laser beam was miraculously managing to find it, it would lose it as quickly, for the atmosphere keeps deviating the laser beam moreover the moon is not static, it moves on its orbit at an average speed of 130 km/h, so it moves of around two kilometers every minute, and we would have to believe that the laser would be able to follow a reflector which has a side of a half meter during several minutes while the moon moves of several kilometers meanwhile? and the laser beam consequently has to be swept so it can find a retro-reflector as small as the one which would have been left by the astronauts on the moon (which has a side of less of a half-meter). If, at a short distance, these retro-reflectors work fine, it is different which a so huge distance as the one which separates the moon from the earth.Īs the laser specialists admit it, the laser beam is deviated by atmosphere of more than a kilometer. ![]() People generally think that the laser operators just aim the laser at the retroreflector on the moon, that it arrives exactly on the laser reflector on the moon, as concentrated as the surface of the retroreflector, and that this one sends back the whole laser beam. This property allows them to send back the laser beam in a perfect way. The Apollo retro-reflectors are constituded with corner prismatic cubes which have the property of sending back a luminous ray exactly in the direction it came from, whatever the angle under which they receive this ray. ![]() They take it as a definitive proof that man has landed on the moon. One of the strong points that the Apollo proponents push forward is that the Apollo astronauts would have put on the moon retroreflectors which are able to send back a laser beam.
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