The human eye and the colorful world long 6

Question 1

What is the Tyndell effect ?

Answer 1

The earth’s atmosphere is a heterogeneous mixture of minute particles. These particles include smoke, tiny water droplets, suspended particles of dust and molecules of air. When a beam of light strikes such fine particles, the path of the beam becomes visible. This is the Tyndell effect

Question 2

Why is the sky blue?

Answer 2

Air molecules and particles in the atmosphere have wavelengths of visible light. Shorter wavelengths, like blue light, are scattered more effectively by the atmosphere compared to longer wavelengths, like red light. Red light has a wavelength about 1.8 times that of blue light. As sunlight enters the atmosphere, fine particles scatter blue light more than red. This scattered blue light is what we see. Without an atmosphere, there would be no scattering.