Color and Refraction

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What is color? What is it that determines the color of an object? And what the heck is refraction? Good thing we just learned about electromagnetic radiation! Especially the visible spectrum. Let's take a look.

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I was struggling to learn this all week but he explained everything clearly in 5 mins... idk why i go and waste hours at school now lol

mtg
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i understand colors on a whole new level....Thanks ....you the best gee

tinatseyi
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Concise and clear. Thank you, I will be using this to introduce colors to my physics class today.

thechaosgardener
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When you mentioned that light refracts and "fans out so they are individually visible" that was so helpful. First time I heard it explained that way.

sharonkende
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You just changed my life with this video. Thank you for explaining it so well.

rodsalomon
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Everytime at night when I’m driving I see a cast of purple in the distance. Like if I see an apartment ahead I will think someone has a violet color but as I drive closer it disappears. It happens anywhere where light is. It’s super frustrating

Valley__
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Now my mind is open i answer my questions cus of u professor dave thank u so much

urpelzr
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The speed of light is a constant, correct? So saying light "slows down" is not really correct, is it? I think I understand that media, such as water or glass, refracts the light so that it travels longer or shorter paths and is therefore 'refracted into its different wavelengths or colors. Is that what is really happening?

gwnaker
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thanks a lot

really helped my teacher explained this for an hour and i learnt nothing
thanks again

Kholanee
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Really amazing teaching. Thanks this helped me a lot

a-techworld
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6 year old video just speared me hours of research for my presentation. Thank you!

matyldalinkova
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Please come teach my modern physics class, you explain these complex topics in a way that is understandable and not monotone smh

alexvalenzuela
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this is the type of explanation that one should pay for.. very good

dermdoc
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Great for a five-minute vid. I’m still so curious! (Not having heard about red, yellow, and blue as I was taught to be the primary colors.)

TylerSimonds
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Here's an interesting question : WHY do different wavelengths of light refract differently when crossing from one medium to an other?

Rhannmah
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Professor Dave, YOU ROCK ! This is fantastic.

pakorg
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This helped me win a debate against my friends. They said primary colors were red blue and yellow not green

crocock
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Thank you professor dave, very good explanation

shubhamjoshi
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So when you mix two colors together, why does it change color then? do the two colors reflect two individual wave lengths due to theire molecular sturcture which combined make a nother color? im confused

philipp
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Please tell me what will happen if I shone white light into blue filter and then green filter. Would any light pass through?

esrasaleh