From StarTalk.

👽 If aliens showed up tomorrow, would we be ready? 👀 Pre-order Take Me to Your Leader here 👇
https://www.simonandschuster.com/books/Take-Me-to-Your-Leader/Neil-deGrasse-Tyson/9781668249970

Why does the light of a searchlight seem to stop? Neil deGrasse Tyson and Chuck Nice break down how sci-fi gets lasers wrong, the “Butter Gun Experiment,” and the inverse square law of light.

Timestamps:
00:00 – Searchlights
00:52 – Where Does the Light Stop?
02:48 – Why Can You See the Light in the First Place?
04:45 – Inverse Square Law of Light
07:17 – Looking at a Column form the Side
09:23 – A Message About Aliens

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About StarTalk:
Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!

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