Explain the reason of the following 1)Clear sky appears blue in colour. 2) The dangerous sign is made in red colour. 3) Clouds apear white in colour.?

Question

Answer

1. in a clear Sky the Ray of light have to travel shorter distance in which the colour having the shorter wavelength disperses the most as a result blue colour it seen.
2. danger signals are made up of red colour because red colour has longer wavelength and can be seen at distance also.
3. cloud have large water particles in which reflection occurs the less as a result colour of light is seen that is white

Answer

Why Is the Sky Blue? |

Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. ... Also, the surface of Earth has reflected and scattered the light.

Why is red colour associated with danger

The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. ... So red light is able to travel the longest distance through fog, rain, and the alike.

Why are clouds white?

Bigger particles like water droplets within a cloud scatter all wavelengths with roughly the same effectiveness. If we consider that there are millions of water droplets in a cloud, the scattered light interacts and combines to generate a white colour.

Answer

Only die to scattering of light

Answer

1) Clear sky appears blue in color:
The phenomenon behind the blue color of the clear sky is known as Rayleigh scattering. It occurs when sunlight passes through the Earth's atmosphere and interacts with the molecules and tiny particles present in the air. Here's an explanation of why the sky appears blue:

Rayleigh Scattering:
When sunlight enters the Earth's atmosphere, it consists of various colors, each having a different wavelength. The shorter wavelengths, such as blue and violet, are scattered more easily compared to the longer wavelengths like red and orange. This is due to the size of the molecules in the Earth's atmosphere.

Scattering of Blue Light:
The small oxygen and nitrogen molecules in the atmosphere scatter the blue light more effectively than any other color due to their size. As a result, when sunlight passes through the atmosphere, the blue light is scattered in all directions by these molecules. This scattered blue light then reaches our eyes, making the sky appear blue.

Why the Sky is not Violet:
Although violet light also has a shorter wavelength than blue light, the scattering of violet light is even more significant. This causes most of the violet light to be scattered out of our line of sight, making the sky appear blue instead of violet.

2) The dangerous sign is made in red color:
The usage of red color in dangerous signs is primarily due to its psychological and biological effects on human beings. Red is known to evoke strong emotions, grab attention, and convey a sense of urgency. Here's why the dangerous sign is made in red color:

Psychological Impact:
Red is associated with danger, caution, and warnings in our culture. It has a strong psychological impact on human perception and can quickly catch our attention. When we see the color red, our brain interprets it as a signal of potential danger, prompting us to be cautious and alert.

Biological Response:
Biologically, the color red stimulates the production of adrenaline, which increases heart rate and blood pressure. This physiological response prepares our body for fight or flight, making us more vigilant in potentially hazardous situations. Therefore, using red in dangerous signs helps to enhance the message's impact and ensure it is noticed promptly.

3) Clouds appear white in color:
Clouds appear white because they consist of numerous tiny water droplets or ice crystals that scatter sunlight in all directions. This scattering, known as Mie scattering, results in the clouds appearing white. Here's an explanation of why clouds appear white:

Scattering of Sunlight:
When sunlight encounters the tiny water droplets or ice crystals present in clouds, it undergoes scattering. Unlike Rayleigh scattering in the clear sky, Mie scattering occurs when the size of the scattering particles is larger than the wavelength of visible light. In the case of clouds, the droplets or crystals are large enough to scatter all colors of light equally.

White Light Scattering:
White light from the sun is a combination of all visible colors, including red, orange, yellow, green, blue, and violet. When this white light encounters the particles in the cloud, it scatters in all directions due to the multiple interactions with the droplets or crystals. As a result, the cloud reflects all colors of light equally, creating the perception of whiteness to our eyes.

Multiple Scattering

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