Comments on Why can someone observe light, even when the light fails to illume that someone?
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Why can someone observe light, even when the light fails to illume that someone?
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I never grokked the optics behind LightHouses and the WW2 poster below work. LightHouse beams are narrow and focussed.
Doubtless, the light source can fail to illumine a seafarer or the enemy submarine. But then how can the seafarer or enemy sailors behold your light source?
It counters intuition that although a light fails to illumine someone, that observer can still behold the light source! Can you please correct my intuition?
I never studied science after secondary school. Please explain like I am (1)5.
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