Laser Turns Off the Lights

Did you know you can use light Radiation pressure from momentum of an electromagnetic wave *notice the sail is reflective because reflected light transfers twice the momentum of absorbed light this concept is even used to propel a kind NASA so if I had a strong enough laser theoretically, I can turn off the lights

A young man explains radiation pressure, showing a Wikipedia page and NASA footage of a reflective solar sail before aiming a red laser at a wall switch. The joke is that, theoretically, a sufficiently powerful laser could push the switch remotely, letting him turn off the lights without leaving bed. The clip ends with the room going dark, making the absurd scientific premise seem successful.

Did you know you can use light to push things? Electromagnetic radiation exerts a force called radiation pressure when it hits an object. This concept is even used to propel a kind of spacecraft called a solar sail. So if I had a strong enough laser, and a sensitive enough light switch, theoretically I can turn off the lights without even having to leave my bed.

• @pokupkabitka / 14274 2022-09-07