When I shine a red laser behind me at a wall I see a strange reflection occurring on my laptop screen Why does this happen? The pattern on my screen occurs exactly where the laser is hitting the wall. When I shine the laser on a reflective surface(glass) I still see the same pattern on my monitor as well as the reflected laser in front of me.
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Qmechanic
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2It's a diffraction pattern caused by the pixels in the screen. See here: Diffraction Pattern on LCD Screen – Michael Seifert Jun 18 '15 at 20:31