Why Can't You Focus Underwater? | Physics with Professor Matt Anderson | M28-05

You know when you're swimming underwater and everything looks out of focus? Why is that? I mean, if I put on a mask then everything is clear. What's the difference?
Physics with Professor Matt Anderson

[@DrRyan82994]

i didn’t even know i couldn’t i basically never opened my eyes underwater and i’ve always been near sighted

[@yoprofmatt]

Maybe YOU can see clearly underwater then? Cheers, Dr. A

[@khaliljutt5296]

Thank you so much

[@samsungs2051]

thank you

[@yoprofmatt]

You're very welcome. Cheers, Dr. A

[@ascaniosobrero]

Some confusion about the anatomy of the eye (the cornea is not involved in focusing, actually)

[@Matyanson]

If you have a mask on, wouldn't the light rays also bend when they come from the water medium to air?

[@freezingboar1235]

I thought this was linus at first

[@yoprofmatt]

From Peanuts? Awesome.

[@SoulTaken]

@@yoprofmatt from Linus Tech Tips

[@fizixx]

Aqueous Humor & Vitreous Humor 👀

[@yoprofmatt]

Better than physics humor, trust me. Cheers, Dr. A

[@fizixx]

@@yoprofmatt Oh, I dunno...how about: photons never take suitcases when they travel, because they always travel light. ha