Scioly.org

jonboyage wrote:

Answer (Click to Show Hidden Text)

I'm not 100% sure about this but is it light blue?

jonboyage wrote:Briefly explain the phenomenon of tertiary rainbows

A tertiary rainbow is the term given to a rainbow produced by light leaving the drop after three reflections. It is generally less bright than one would expect, due to various factors such as glare from surrounding light, light that does not undergo reflection within the drop, etc. Another factor that makes it difficult to see is its angle in relation to the Sun - ~45°.

Avogadro wrote:

jonboyage wrote:Briefly explain the phenomenon of tertiary rainbows

Not sure how far I should go with this, but I'll give a bit.

Best I Can Come Up With (Click to Show Hidden Text)

A tertiary rainbow is the term given to a rainbow produced by light leaving the drop after three reflections. It is generally less bright than one would expect, due to various factors such as glare from surrounding light, light that does not undergo reflection within the drop, etc. Another factor that makes it difficult to see is its angle in relation to the Sun - ~45°.

Avogadro wrote:Why is the sky blue?

sunlight scatters off the molecules in the Earth's atmosphere (Rayleigh scattering). This scattering is effective at short wavelengths, thus the light scattering down is primarily blue.

jkang wrote:

Avogadro wrote:Why is the sky blue?

Because (Click to Show Hidden Text)

sunlight scatters off the molecules in the Earth's atmosphere (Rayleigh scattering). This scattering is effective at short wavelengths, thus the light scattering down is primarily blue.

jkang wrote:A wave has a phase velocity of 2c (where c = the speed of light in a vacuum). How is this possible?

I have two possible explanations: 1. The wave has entered a theoretical material with a refractive index of 0.5. 2. The wave manages to have an incredibly short period.