Avicenna ( 980-1037 ) agreed with Alhazen that the speed of light is finite, as he " observed that if the perception of light is due to the emission of some sort of particles by a luminous source, the speed of light must be finite . " Abk Rayhn al-B + rkn + ( 973-1048 ) also agreed that light has a finite speed, and he was the first to discover that the speed of light is much faster than the speed of sound.
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For ether, Pecorini said they used a " loose depth of field; everything becomes non-defined "; for adrenochrome, " everything gets narrow and claustrophobic, move closer with lens "; mescaline was simulated by having " colors melt into each other, flares with no sources, play with color temperatures "; for amyl nitrite, the " perception of light gets very uneven, light levels increase and decrease during the shots "; and for LSD, " everything extremely wide, hallucinations via morphs, shapes, colors, and sound ."
