Question

Why is the sky blue?
Why are there 7 colours in a rainbow?
What is the chemical symbol for zinc?

Answer 1

Answer:

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1. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
2. Refraction of the Seven Colors of the Spectrum.A rainbow has seven colors because water droplets in the atmosphere break sunlight into seven colors. A prism similarly divides light into seven colors. When light leaves one medium and enters another, the light changes its propagation direction and bends.
3. Zinc :- Zn

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Answer 2

Answer:

sky is blue is due to scattering of light.

Explanation:

the chemical formula of zinc is Zn.