Assertion : Sky appears blue.Reason : Colloid | vedclass

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(A) The sky appears blue due to the scattering of sunlight by colloidal particles (dust and air molecules) present in the atmosphere.According to Rayl

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) The sky appears blue due to the scattering of sunlight by colloidal particles (dust and air molecules) present in the atmosphere.According to Rayleigh scattering,the intensity of scattered light is inversely proportional to the fourth power of the wavelength $(I \propto 1/\lambda^4)$.Since blue light has a shorter wavelength compared to red light,it is scattered more effectively by these particles,making the sky appear blue.

	Dispersed Phase	Dispersion medium
$1$	liquid	solid
$2$	liquid	liquid
$3$	solid	liquid
$4$	solid	solid

Assertion : Sky appears blue.
Reason : Colloidal particles of dust scatter blue light.

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Assertion : Sky appears blue.Reason : Colloidal particles of dust scatter blue light.