Question

What is the resonance phenomenon? Explain how the resonance phenomenon has to do with the blue coloration of the sky.

Answer 1

Resonance, an object free to vibrate tends to do so at a specific rate called the object's natural, or resonant frequency. Such an object will vibrate strongly when it is subjected to vibrations or regular impulses from outside at a frequency equal to or very close to its natural frequency. This phenomenon is called resonance.
in air column experiment we can find the frequency of A tuning fork using the resonance phenomena.
Blue light pushes on the electrons with a frequency that is close to their natural resonant frequency, which causes the blue light to be re-radiated out in all directions in a process called scattering. The red light which is not scattered continues on in its original direction.