Consider the following statements:

(a) The wavelength of red light is about 1.8 times the wavelength of blue light.

(b) When sunlight passes through the atmosphere, microscopic particles scatter blue light more intensely than red light.

Which of the above statements help us to understand the blue colour of the clear sky?

Correct option is D

The correct answer is (D)   ​Both (A) and (B)

• When sunlight passes through the atmosphere, the tiny particles in the air scatter blue light more than red light. This is called Rayleigh scattering, and it's why the sky looks blue during the day.
• Blue light has a shorter wavelength than red light, which is why it gets scattered more easily by the particles in the air.
• The wavelength of red light is about 1.8 times longer than that of blue light.
• Because blue light has shorter wavelengths, it is scattered more by air particles as it travels through the atmosphere.
• As a result, the sky appears blue to us when the scattered blue light reaches our eyes.
• The difference in the wavelengths of red and blue light also plays a role in creating rainbows.

Information booster:

• When sunlight is refracted by raindrops and reaches the observer, a rainbow forms.
• Although rainbows are often depicted as being created by teardrop-shaped raindrops, most raindrops are actually spherical.
• This spherical shape is ideal for creating the rainbow effect.