Why Is A Rainbow Curved? | Newton's Apple
ฝัง
- เผยแพร่เมื่อ 7 ก.พ. 2025
- Ira Flatow and our physics friend Jack demonstrates how rainbows work and why they refract using light.
Hosted by Ira Flatow, Newton's Apple was an American educational television program about science produced and developed by KTCA of Minneapolis-Saint Paul (Now @Twin Cities PBS ) and distributed to PBS stations in the United States that ran from October 15, 1983, to January 3, 1998.
________________________________________________
Enjoy what you're watching? Subscribe now to see more Minnesota history, music, documentaries, and more: www.youtube.co...
Instagram: / twincitiespbs
Facebook: / tptpbs
TikTok: / twincitiespbs
This content is made possible by viewers like you. Support Twin Cities PBS: www.tpt.org/give.
#NewtonsApple #Science #rainbow
This is the best explanation I've seen! Thank you!
So the sun is a laserpointer?
definitely not
Its pretty good, but check out Phisics girl. She went a little farther and showed how the 42 degrees is happening because its the maximum angle, that the red light can escape the droplet in that direction. Red light that enters the droplet a little closer to its center has more acute angle of reflection, the light that enters farther from the center reaches maximum 42 degrees, and the light farther away gives more acute angle again. So more red light goes out close to 42 degrees.
Also she showed how for different colours, this maximum angle is different, for purle its 40 degrees.
Same here! I just watched a bunch of videos, and started to get it, but this one put it all together! Funny how an older video can be so much better! Loved all the models!
Excellent video. It pays to have physics educators all over the world
@@RawDiscovery theres no evidence to create a complete rainbow
2:38 the Carl Sagan impression was spot on lmao
Amazing explanation, thank you.
That wad such an amazing explanation. The demonstrations and humour just made it more fun and easy to understand. Hats off to the teacher
This video deserves all the likes on youtube
We need more television / streaming like PBS....
Best explanation👍👍👍🙂...only the video which can explain the curved shape of rainbow..
An amazingly concise and clear explanasion. Well done!
There were two interesting points left out. The first is to imagine the rainbow as a disc. Remember they said the ground blocks the lower part of the rainbow, but you can see that from an airplane. If you could see that disc you would the shadow of your head in the center of the disc. This is related to the idea that everybody sees their own rainbow.
The second is the dark band between the first rainbow and the double rainbow. That dark contrast is there because it's darker than the first rainbow and double rainbow. Remember, when you see the rainbows that is extra light entering into your eye. The raindrops do not refract light between the first and double rainbow, so there is less light there. Thus the band in between has less light (and gray light at that) than the rainbows, and so it appears darker.
Oh, a third point. It does not have to be raining where you are. They're just needs to be water drops in the plane of the rainbow. This is how water hoses can make rainbows, for example.
"The first is to imagine the rainbow as a disc." Correct. But there is more to it than you describe.
Red light is reflected _at_ _all_ _angles_ from 0° (straight back to the sun) to about 42°. But it is much, much brighter in the outer 0.5° of this range. And only red light is reflected at 42°.
Green light is reflected _at_ _all_ _angles_ from 0° to about 41°. Again, it is much brighter in the outer 0.5° of this range. But there are also dim amounts of red, orange, and yellow. This makes the green band less vibrant than the red.
Violet is bright around 40°, with all other colors present in lesser amounts. And inside 40°, all colors are present in about equal amounts. This is why the "disc" at 0:15 appears gray inside the colors. It really is a filled-in circle, or a disc.
"The dark band between the first rainbow and the double rainbow. That dark contrast is there because it's darker than the first rainbow and double rainbow." No, it's because no light reflects here, so it is darker than below the first rainbow, or _above_ the second. Yes, the "inside" of the second bow is above it. It is centered on the sun, is about 130° wide, and so is seen upside down just above the first bow.
This was the best and easiest explanation!
Very nice explanation
Phenomenal explanation thanks actually
Best explanation so far!! Very well explained, cleared all my doubts
Thanks for explaining
The best explanation ❤
Superb explanation
Best visual explanation I've ever seen. Thank you!
What a great explanation. Thanks ❤😊
Very well explained! Thank you 🙏🏻😊
"If you could get to the end of the 🌈 I can guarantee you a pot of gold"😆
Beautiful explanation
I'm science teacher
This helps me a lot
Love the explaination
wow it's a great explanation
thanks! so clearly explained
What about rainbows after a rain storm with no water droplets? That’s usually when I see a rainbow is after a rain storm.
This video was very helpfull for concept of raindow
Super explanation
Wow great explanation ♾️
The voice of Science Friday!
Super best explanation
"Everybody sees different rainbows?"
"Your very own rainbow!"
😲
Incredible!!!!
Omg literally the best explanation
Wow, thanks!
Por fin, una explicación científica, great great!
解釋得非常清楚 我終於知道為什麼彩虹是弧形
Excellent
Like, this masterpiece is the master of headmaster itself.💧
Great detaile
Very nice...
This is cool, so cool.
Very interesting
The way it works indoors you need water, light and a mirror. The light needs to shine through the water reflect off the mirror and back on to the water as a rainbow except it won't be curved unless the mirror is curved. If your wondering what that curved mirror is outside its called the FIRMAMENT its in the bible.
@@JoseGarcia-rt3fy A rainbow takes the form of the surface that creates it. Water is the screen that allows you to see the spectrum of light from the sun, but you need a glass or prism like material to create it. Glass or a mirror is usually used to cause the wavelengths of light to separate.
In Genesis 9: 11-17 the Bible states that the Rainbow is God's covenant with man, that He will never again destroy the earth with a flood. That's a nice thought, but how does that relate to what we experience in real life? What is the actual significance of a rainbow and what does a rainbow have to do with raining or the proof that there won't be another world wide flood?
Ancient Hebrews believed there was a glass like dome structure called the firmament that stretched out over the earth, protecting it and separating the waters above from the waters below[Gen7]. They believed God temporarily opened up the windows of the firmament and allowed the waters above to pour in causing the world to flood[Gen 7:11].
With their understanding of cosmology, the rainbow is the manifestation of God's promise that His firmament is still in place, holding back the waters above from destroying the earth below. Everytime it rains on a sunny day, the conditions are just right to allow the proof of His handiwork to be seen,
Psalms 19:1
"The heavens declare the glory of God; and the firmament sheweth his handywork"
great ❤
Love it !
Would be cool to learn how to calculate dimentions of the rainbow and distance to it. Distance between red and purple droplets, inner and outer diameter of the whole thing.
What they actually missed telling is the existence of Anti solar point about which Rainbow will trace its shape.... else rest of the explanation is fantastic.
So if there are spill off of these different colors, why is the arrangement always ROYGBIV?
Will they ever get these shows on to DVD?
This was so good, and I grew up watching PBS, but don't know this show!
@@richardmahn7589 Technically it wasn't a PBS show and was not on the schedule. It's possible your station didn't carry it. The PBS stations who chose to buy it, usually aired it non-primetime on weekends.
BEST !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Can somene who knows tell me what year this particular episode was broadcasted? Late 80s?
42… the answer to life the universe and everything
Imaaaaaagine skyyyyyy hiiiiiiigh above is Caribbean Blue 😂😂😂 I guess 41 would be the angle for it?
its because of the dome above.
A rainbow takes the form of the surface that creates it. Water is the screen that allows you to see the spectrum of light from the sun, but you need a glass or prism like material to create it. Glass or a mirror is usually used to cause the wavelengths of light to separate.
In Genesis 9: 11-17 the Bible states that the Rainbow is God's covenant with man, that He will never again destroy the earth with a flood. That's a nice thought, but how does that relate to what we experience in real life? What is the actual significance of a rainbow and what does a rainbow have to do with raining or the proof that there won't be another world wide flood?
Ancient Hebrews believed there was a glass like dome structure called the firmament that stretched out over the earth, protecting it and separating the waters above from the waters below[Gen7]. They believed God temporarily opened up the windows of the firmament and allowed the waters above to pour in causing the world to flood[Gen 7:11].
With their understanding of cosmology, the rainbow is the manifestation of God's promise that His firmament is still in place, holding back the waters above from destroying the earth below. Everytime it rains on a sunny day, the conditions are just right to allow the proof of His handiwork to be seen,
Psalms 19:1
"The heavens declare the glory of God; and the firmament sheweth his handywork"
When a rainbow was a rainbow. If you know what I mean
💥💥
i wonder now what would happen if i were ascending, what would the rainbow look like if i were still able to see it? i dont think it would dissappear since the curtain of droplets would start from the clouds...?
I have seen a circle rainbow, I think more than 5 times in my life. I have seen while I'm on ground zero
Yes! Those are often called Sun Dogs! en.wikipedia.org/wiki/Sun_dog
❤❤❤
Now the rainbows are walking around everywhere
However, I would like to know the length and the height of a rainbow.
It all depends where the raindrops are, and where you are, and the angle of the sun light. You are the focal point.
3:33
because it's a torus field
haha😄 I am happy😁
A rainbow is curved because it’s a reflection off the dome shaped FIRMament that God stretched over the earth like a tent . Like a prism
A rainbow takes the form of the surface that creates it. Water is the screen that allows you to see the spectrum of light from the sun, but you need a glass or prism like material to create it. Glass or a mirror is usually used to cause the wavelengths of light to separate.
In Genesis 9: 11-17 the Bible states that the Rainbow is God's covenant with man, that He will never again destroy the earth with a flood. That's a nice thought, but how does that relate to what we experience in real life? What is the actual significance of a rainbow and what does a rainbow have to do with raining or the proof that there won't be another world wide flood?
Ancient Hebrews believed there was a glass like dome structure called the firmament that stretched out over the earth, protecting it and separating the waters above from the waters below[Gen7]. They believed God temporarily opened up the windows of the firmament and allowed the waters above to pour in causing the world to flood[Gen 7:11].
With their understanding of cosmology, the rainbow is the manifestation of God's promise that His firmament is still in place, holding back the waters above from destroying the earth below. Everytime it rains on a sunny day, the conditions are just right to allow the proof of His handiwork to be seen,
Psalms 19:1
"The heavens declare the glory of God; and the firmament sheweth his handywork"
You can tell by the way they are speaking that they made this for nit wits to believe
But rainbows show up after the rain? (Rain drops)
Bahahaha people are actually believing!!😂 🧢
Fantastic vulgarization!
That doesn't work. You can see the bend of the entire rainbow. The way he explained it you would only see a little portion at a time.
Nope it doesn’t explain it at all
Did somebody say... double rainbow
I still don’t get it.
Vishal sir
:)
Nature is WOKE 😡
Theres no evidence to make a complete rainbow.
Nope . Earth is not a spinning ball and this is not science
Show your evidences man, explain the midnight sun in Antartica in your plane, explain the 6 months of day and night in North and in the south pole
You're right. This is the most ridiculous thing I've ever heard. Light bends in an angular way even WITHIN a raindrop but somehow forms an impossible curve when light only travels in straight lines. Hogwash
@@simmzmcnuggalight is very confusing. You would not believe how complicated any model of light can get. Just because you don’t understand it doesn’t mean it isn’t the truth. Trust me this is very simple compared to other topics like wave-particle duality
@@simmzmcnugga the thing is when the light comes to us on a certain angle then only we are able to see the rainbow, only that angle arc is visible to us thats why it appers in this shape