Submitted by Fine_Play_8770 t3_yzaxor in space
dusty545 t1_iwyx6f0 wrote
Lights travels in straight line "rays" and is quantized in discreet packets called photons. Light also has wave-like behavior at the quantum level.
However, the emission source, such as a light bulb or star, often emits rays in many or all directions. It is quite difficult to emit rays in only one discreet thin beam direction. Light also scatters, re-radiates, reflects, refracts, and diffracts when traveling through a dense matter medium such as our atmosphere. Which is why turning on a flashlight in a dark room illuminates all of the walls around you and behind you.
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s1ngular1ty2 t1_iwyxzl9 wrote
You can think of light as a wave even from light bulbs. It is always a particle and a wave simultaneously.
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