25 Comments

1. 

   TheJimzhe842 on October 23, 2011 at 5:14 am

   @OKMUNWURX actually I’ve tried it with soft pastel, in art class/ it works!

2. 

   OKMUNWURX on October 23, 2011 at 5:20 am

   @TheJimzhe842 He holds the chalk with a light touch, on a steep angle and lets it hop as he drags it across the slate. Takes practice.

3. 

   Lightsishot on October 23, 2011 at 6:19 am

   so i learned this in high school wtf

4. 

   uploadJ on October 23, 2011 at 6:26 am

   @TheJimzhe842 “HOW DO YOU DRAW A DOTTED LINE SO FAST WITH CHALK????”

   I think, hold chalk at an angle either straight up or inclined _away_ from the direction of the line being drawn … he uses that trick often and I was wondering that myself …

   .

5. 

   kotofu on October 23, 2011 at 6:31 am

   rainbows, this is how they work! XD

6. 

   sameerpatel105 on October 23, 2011 at 7:17 am

   i mean on the rotating black and white wheel, not the clown picture thing, that was awesome!

7. 

   sameerpatel105 on October 23, 2011 at 7:22 am

   I DIDNT SEE THE COLOUR!!???! why did it not translate through video?

8. 

   AmishUnicorn on October 23, 2011 at 7:37 am

   @LuvStayn that’s not the point…

9. 

   TheJimzhe842 on October 23, 2011 at 8:33 am

   HOW DO YOU DRAW A DOTTED LINE SO FAST WITH CHALK????

10. 

    evangrogers on October 23, 2011 at 8:45 am

    @fooberdoobs you wanna do it in my butt?

11. 

    junior1984able on October 23, 2011 at 9:21 am

    the index of refraction for glass is about 1.60and air 1.00

12. 

    freethisone on October 23, 2011 at 10:07 am

    the deceleration of refraction due to water is caused by the laser transfer of electrons in the water, and therefore the light is also a carrier of these electron.
    but we have already learned that the light has a magnetic, and electric component.
    if the photon passes through small dust particles, ie conductive particles, then a charge is passed to these particles, and they scatter, due to a increase of the spin electron in said magnetic, conducting particles. so we loose photon enrgy.

13. 

    bruingineering on October 23, 2011 at 10:19 am

    Great stuff!

14. 

    johnnyfun26487 on October 23, 2011 at 11:06 am

    Thank you MIT professors. Thank you MIT so much. Such a wonderful job. I really appreciate it.

15. 

    3000moti on October 23, 2011 at 11:52 am

    who is he ?

16. 

    Hyntime on October 23, 2011 at 12:30 pm

    this all says that through tv what we think we see could be manipulated. so are we being manipulated from television.

17. 

    henf5671 on October 23, 2011 at 12:45 pm

    @LuvStayn agreed but at least these videos can make an individual understand the concepts inside and out before they take a real class and ace it just like that. then these people can eventually get a degree. by the way, i’m not one of those people. if i watched these videos first and took the class, it would take me forever to graduate. i take the course without watching the videos first. but i may use these videos as a supplement to my class to help me further my understanding on a topic.

18. 

    filipeaa320 on October 23, 2011 at 12:48 pm

    I can say Huygens and I’m not Dutch….=P I’m brazilian….=P

19. 

    RemixBlender on October 23, 2011 at 1:42 pm

    i felled in sleep when i watched this videoo …

20. 

    bigfhead on October 23, 2011 at 2:24 pm

    i don’t see the colors

21. 

    fooberdoobs on October 23, 2011 at 3:11 pm

    @LuvStayn YEAH!!……That’s the spirit!!……let’s all band together and discourage people from exploring interesting phenomena!!…….you’d rather they were all watching “What, What in the Butt”??……..

22. 

    100nassar on October 23, 2011 at 3:46 pm

    Don’t you mean that (if dispersive) the bass sounds would be heard BEFORE the violen??
    –dale nassar
    La.

23. 

    kristiankroflin on October 23, 2011 at 4:11 pm

    Light´s waves, light´s particles, light´s fields, light´s spheres. Where is the problem since it depends on the distance between observer and the observed (also with which kind of “mediator” the observer observes) like it depends on the brain of the observer.

24. 

    kristiankroflin on October 23, 2011 at 4:17 pm

    Newton did assume that theta1 (see from 13:50) stays the same after it has reached the water. How come? This would´ve meant that the light gained energy from where exactly? It wouldn´t only be a prpetuum mobile it would be an energy gaining perpetuum mobile.

25. 

    kristiankroflin on October 23, 2011 at 4:27 pm

    I call those angles theta4 and theta5 by the way.