Mon Prof Augmenté
Blue Sky Light
Open to everyone until Friday, October 2
To keep it, print it while it is open.
Sunlight contains many colors. Air makes short blue waves spread out much more than long red waves, so the sky looks blue.
In the picture
- Incoming sunlight: white light entering the clear air.
- Tiny gas sphere: a small particle floating in the air.
- Blue light path: a short wave bending away in many directions.
- Red light path: a long wave passing mostly straight through the air.
Examples
- A clear sky at midday looks blue.
- The Sun looks redder near sunset.
Key takeaways
- Short blue light waves are spread widely by air.
- Long red light waves are spread less and travel straighter.
Carry on in the app
Three questions on this lesson, to check the idea stuck. Free in the app while the lesson is in the free week.
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
Get the app
Free app, optional subscription
App Store Google Play
