Why the Sky is blue and Sunsets red

Why the sky is blue, the sun is yellow and sunsets are red is explained here.
By James Dann for ck12.org CC BY SA

Category:

Education

Tags:

• scattering
• sunsets
• sky
• wavelength
• physics

[jamdann21]

red and green makes yellow. Get yourself a primary green light and a primary red light and shine them on the same place on white paper and you will see yellow. I just did it yesterday for my students and 100 out of 100 saw yellow. It is also how our eye works, we only have cones to detect red, green and blue. The intensity at which each cone fires makes the various colors in our brain. Possibly you are mixing paint that is not pure red and green? thx anyway for your comment.

[hawkinscraig05]

Excellent video

[jamdann21]

@ozzert

thankyou but there is no confusion and i am clearly talking additive. The video you sent me also agrees with what i say here, as he mixes green and red and out pops yellow. I do not teach paint, i teach the electromagnetic spectrum of which color is a very small part.

see my vid using a spectrometer that measures the wavelengths:

v=yOX4xwm2Chk

[newtoninspired]

i wish, my teachers explained the same theory like the one in the video. This helped. Thank you ....

[Roboklintworth]

red plus green = yellow? its brown. the sun is yellow because it has the highest intensity of yellow compared to other colors. but great video nontheless.

[78punas]

thank you Sir.

[volcro5]

Thanks!! :))

[gritcameronfan]

your awesome