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At sunset, the sun appears reddish. What is MOST LIKELY the reason for this phenomenon?
A) Sunlight travels through a longer distance at sunset and interacts with more particles.
B) Sunlight travels through a shorter distance at sunset and interacts with more particles.
C) Sunlight travels through a longer distance at sunset and interacts with fewer particles.
D) Sunlight travels through a shorter distance at sunset and interacts with fewer particles.

Respuesta :

AL2006
The only correct statement on the list is choice-A./

Answer :

(A)" Sunlight travels through a longer distance at sunset and interacts with more particles ".

Explanation :

The sunlight is made up of seven colors. The wavelength of red light is maximum as compared to other colors.

And as per Rayleigh law [tex]I \propto \dfrac{1}{\lambda^4}[/tex]

Where,

I is the intensity of scattered light

[tex]\lambda[/tex] is the wavelength

The scattering of red light is least.

At sunset, the sunlight travels through a longer distance.This is because they are near to horizon.

Also, there are many particles, dust and moisture are present in the atmosphere in the evening. So, the sun appears reddish.

Hence, the correct option is (A).

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