1. Why is they sky blue? 2. Hoes does a solar panel use the sun's energy? 3. What chemical reactions happens in a nuclear bomb?

1 Sky is blue because most of the sky is filled with hydrogen. Scattering of blue light is strongest among all the colours. Therefore, sky is blue. Sky is limited to the height of 1000km or of that order.

2. Sun light is absorbed. This moves electrons to higher energy level, similar to excitation. They remain in that level for a larger time. Now you have created charge separation, similar to recharge batteries. This system can be used in place of battery cells. This is how the solar energy is exploited.

3. Nuclear explosion is due to heavy element atoms like uranium is split into two or more pieces. The total mass of the pieces is less than the mass of Uranium. This difference comes out as energy by e=mc^2. It is not a chemical reaction.

1. The light that get refracted the least
2. Takes more than 1 line to explain
3. Main NUCLEAR reaction: Uranium-235 + neutron ---->> Krypton-92 + Barium 141 + 3 neutrons

The sky fluoresces in the day time the more sky volume is observe the bluer it appears.At night the sky appears as a very dark blue.

1. The sky isn't actually blue. It is transparent.
2. Photons contain both energy and momentum. They can knock electrons from their orbit around an atom giving a charge that is free with energy.
3. Not a chemical reaction at all. So the answer is none.

1. Easy to find on Google.
2. What type of solar panel? Thermal or photoelectric?
3. Trick question. Nuclear (not chemical)reactions happens

it's called a search engine, Google it.