Why are clouds white, Science

Assignment Help:

Why are clouds White? Why does a day have 24 hours?

Answer: A cloud is a visible accumulation of very tiny water droplets or solid ice that float in the air. Clouds are usually white in appearance due to the fact that it reflects all the visible wavelengths of light from the sun. The sun's light made up of different colors(rainbow colors)that appear as a white light when combined. These colors can demonstrated using a prism that scatters the sun's light. The water droplets or ice crystals that make up the cloud reflect all the light of the seven visible wavelengths (red, orange, yellow, green, blue, indigo, and violet) all together without dispersing each color. Thus the clouds are white because they effectively reflect the wavelengths of visible light spectrum of the sun in all directions more or less equally. Answer for 2nd Question For thousands of yearspeople all over the world have been using terms and divisions like "day","night","hour", "minute", "yesterday", "tomorrow" to talk about lengths of time The idea of "a day"- from when the sun rises to when it sets-has always been a pretty basic way of thinking about time. Within "a day" people usually break down time into units we call hours. Nobody knows the exact reason why it was decided to measure out an hour so that 24 of them would fit in to a day, but we do know the practice goes all the way back o the ancient Egyptians. One reason they choseto divide a day in to a 12-hour day and a 12-hour night is probably because they used to count a system based on 12. Its also possible they chose 12 because that was the number of moon cycles in a year. , The Egyptians made and used sundials to tell time and by looking at the remains of these, we can trace what is believed to be the origins of our 24-hour day back to them.


Related Discussions:- Why are clouds white

Explain ablation, What is ablation? Ans)  Ablation is a technological t...

What is ablation? Ans)  Ablation is a technological term for the loss of snow and ice from a glacier. The process happens by a combination of the two physical processes, meltin

Explain inspiratory capacity and expiratory reserve volume, Explain Inspira...

Explain Inspiratory Capacity and Expiratory Reserve Volume Inspiratory Capacity (IC):  It is the tidal volume and the volume of air taken during maximum inspiratory effort.

Making a housing box for weather instruments, Making a housing box for weat...

Making a housing box for weather instruments Some of your weather instruments must be uncovered to the weather. Between these are the wind vane, the wind speed indicator and th

Objectives of identification of compressed gases , Objectives After doi...

Objectives After doing this exercise you should be able to: 1.  Identify the contents of the gas cylinder by observing the colour code, 2.  State the nature of the gas pr

Planets., What are all the planets in our solar system?

What are all the planets in our solar system?

Fine-grained black limestone, Give a rock name for sample. Note that the co...

Give a rock name for sample. Note that the colour of this type of rock varies greatly, depending on the abundance of organic matter and iron oxides. Samples are both carbonate rock

Matter, heavy matter in the world

heavy matter in the world

Scientific activity, Describe the factors which decide the broad area of Sc...

Describe the factors which decide the broad area of Scientific activity?

Formation of the solar system, Formation of the solar system:   This...

Formation of the solar system:   This theory is based on the assvmption that the Sun and all the planets were formed from a huge rotating cloud df interstellar gas and dust.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd