This is called Schlieren photography, a technique that makes air pressure changes visible to the human eye. To capture this, physicists use an incredibly precise optical system. They aim a point source of light at a large parabolic mirror, perfectly aligning the beam with the edge of a razor blade before it hits the camera lens. Normally, the air is too thin to block any light. But when a supersonic bullet travels faster than the speed of sound, it builds up massive pressure in front of it. This
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Follow @physics_unplugged | video description 👇 Camera exposure and color settings can significantly affect how skin tones appear in photos. Exposure refers to how much light enters the camera; if it’s too high (overexposed), the skin can look unnaturally pale or washed out, while if it’s too low (underexposed), the skin may appear too dark, hiding natural details. White balance and color settings also play a role - if a camera leans towards cool tones (bluish light), skin can look pale or ashy
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