The sky is blue because?

Question

The sky is blue because

A) the atmosphere transmits mostly blue light.

B) molecules scatter blue light more effectively than red light.

C) the atmosphere absorbs mostly blue light.

D) molecules scatter red light more effectively than blue light.

E) the Sun mainly emits blue light.

i know its either b or d, please explain

are u sure its not b

u say its d, but then u explain how they scatter blue light more effectively which is b

this is confusing now, half say b half say d, so i didnt get anywhere

Answer 1

B is correct.

When you look at the sky, rather than seeing the black of space, you see light from Rayleigh scattering off molecules the air (mostly Nitrogen/Oxygen). Rayleigh scattering is proportional to the inverse fourth power of wavelength, which means that the shorter wavelength blue light will scatter more than the longer wavelength green and red light. This gives the sky a blue appearance. Conversely, when you look towards the sun at sunset, you sees the colors that were scattered the least -- the longer wavelength, red light.

Answer 2

* D
The Earth's sky is blue because the air molecules (largely nitrogen and oxygen) are much smaller than the wavelength of light. When light encounters particles much smaller than its wavelength, the scattered intensity is inversely roportional to the 4'th power of the wavelength. This is called "Rayleigh scattering," and it means that half the wavelength is scattered with 2**4 = 16 times more intensity. That's why the sky appears blue: the blue light is scattered some 16 times more strongly than the red light. Rayleigh scattering is also the reason why the setting Sun appears red: the blue light has been scattered away from the direct sunlight.

Thus, if the atmosphere of another planet is composed of a transparent gas or gases whose molecules are much smaller than the wavelength of light, we would, in general, also expect the sky on that planet to have a blue color.

Answer 3

its D
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

The white light from the sun is a mixture of all colours of the rainbow. This was demonstrated by Isaac Newton, who used a prism to separate the different colours and so form a spectrum. The colours of light are distinguished by their different wavelengths. The visible part of the spectrum ranges from red light with a wavelength of about 720 nm, to violet with a wavelength of about 380 nm, with orange, yellow, green, blue and indigo between. The three different types of colour receptors in the retina of the human eye respond most strongly to red, green and blue wavelengths, giving us our colour vision.

Answer 4

its B

Answer 5

It is B.

Answer 6

B

Answer 7

its D...