Parabolic mirrors 2 | Geometric optics | Physics | Khan Academy

[@cath2junga12]

I'm in uni taking a physics paper and this is actually the only time i've ever understood nor took interest in optics at all ! Thank you Sal you are awesome

[@LNasterio]

having this in university year 1 exam... thanks khan, you saved me days of time.

[@EscortsSociety]

You made this so much easier to understand than my professor.

[@leekelly4574]

"These lines are hard!" LOL

[@taters1123]

Standing ovation to you! Magnificent explanation!

[@abdulmagedkhaled9480]

Slaman Khan you're my hero, I wanna be like you one day, thank you so much, you saved my life several times.

[@midnightsilverpuppy]

Slaman

[@microz0258]

Slanam

[@saibotxv9208]

lol you're named "faithless"

[@abdulmagedkhaled9480]

You are funny guys 😒

[@Fjdjdydydududu34]

thank you, khan academy.... now I am going to get 100% on my test

[@Syvmana]

YES! THANK YOU! OH MY GOD! Perfect video, I forgot all about this my sophomore year and now it's completely fresh!

[@doucoureaboubacar146]

Thank you so much KHan Academy. Have a much better understanding

[@LNasterio]

@DalaDos28 I am doing Engineering in the University of Melbourne. I was cramming for physics exam. This Video did help me alot, I got H2B for physics eventhough I was an hour late for the exam :D (the exam was 2 hours long)

[@Aba9846]

I love you so much. You literally saved my life

[@derrickyang7928]

Best explanation ever

[@hasansharif7205]

Thank You so much

[@Nandine2]

videos on material balance would be nice......

[@JoshMiltz]

2:57 will look, will look, will look

[@midnightsilverpuppy]

Loved it

[@Toronto2245]

Grade 10 science memories. I did terrible in grade 10 science even tho i love science, but my teacher was just too much of an idiot ;'( I love you khan!

[@S0ltys]

Thanks dude, its awesome. I hope, I pass the exam very well because of you :)

[@mbran96]

University... I'm grade 8 and we have an exam of this next week... Swedish public school

[@caglaunal7254]

Same here in Turkey

[@MariaMaria-wf7jl]

Süper

[@iluart_]

I know that feel...

[@Edge0fPain]

*KHAAAAAAAAAAN!!!!!

[@PabloH4]

Sal, have you tried using a ruler to draw straight lines? no sarcasm, really :-)

[@tadm123]

if a virtual image are images that object is not really there, dunno why this is a real image if the object is not really there too :O

[@ziqiyin745]

Not agree that the real image has the same size as actual object when the object is moved to central point.Because if the size is the same, the triangle that you drew would make the central point not be the twice distance of focal point from vertex. Can you explain it?

[@diwangislucky]

What's shown here is just a ballpark estimate.

[@kolianovic228]

Thank you so much, i love you, would you marry me, i am ready, it is the best explanation Ever, end FOREVER, like Beatles or Pink Floyd, I AM YOUR FAN !!!!!!!!!!!!!!!!

[@KrazyHusy]

i think im going to fail gcse physics

[@Sanchitoooo]

:O

[@amirelias885]

your drawing is not the neatest ? .... oh please