The clear sky appears blue because:(A). Blue light gets absorbed in the atmosphere(B). Ultraviolet radiations are absorbed in the atmosphere(C). Violet and blue lights get scattered more than lights of all other colours by the atmosphere(D). Light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.

The correct answer is (C). Violet and blue lights get scattered more than lights of all other colors by the atmosphere.

The phenomenon responsible for the blue color of the sky is called Rayleigh scattering. When sunlight enters the Earth's atmosphere, it encounters gas molecules and tiny particles suspended in the air. These molecules and particles scatter the sunlight in different directions.

The scattering of light depends on its wavelength. Blue and violet light have shorter wavelengths and higher energy compared to other colors in the visible spectrum. These shorter wavelengths are more easily scattered by the molecules and particles in the atmosphere.

As a result, when sunlight passes through the atmosphere, the blue and violet light is scattered in all directions. This scattered blue light is then observed by our eyes, making the sky appear blue to us.

In contrast, light of longer wavelengths, such as red and yellow, is scattered less by the atmosphere and tends to pass through more directly. This is why during sunrise or sunset, when the sunlight passes through a thicker layer of the atmosphere, the shorter wavelength blue and violet light is scattered even more, and the longer wavelength red and orange light dominates, giving the sky a reddish or orange hue.