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 the constituents and examination of urine, Explain the Constituents...

Explain the Constituents and Examination of Urine The quantity of urine in 24 hours in adult normal individual varies from 600 ml to 2500 ml. It is pale yellow in colour, hyper

Explain riboflavin (vitamin b2), Riboflavin (vitamin B2) Riboflavin was...

Riboflavin (vitamin B2) Riboflavin was isolated in  a crystalline form from milk by Kuhn  and co-workers in 1933.  Because of this,  the  early  name  of  the  vitamin  was  la

Define edta titrimetric method for estimation of calcium, Define EDTA Titri...

Define EDTA Titrimetric Method for Estimation of Calcium? The amount of calcium in any sample can be estimated by EDTA titrimetric method. The principle behind this method is d

Explain the secretion of aldosterone, Explain the Secretion of Aldosterone ...

Explain the Secretion of Aldosterone A minimal amount of ACTH is also needed for the secretion of aldosterone. The secretion of aldosterone is thus stimulated by: a d

Working memory index, Mr. X's Working Memory Index (WMI) is interpretable; ...

Mr. X's Working Memory Index (WMI) is interpretable; the components do not vary significantly, so his WMI score can be interpreted as a single construct. WMI includes three tasks.

Geocentric theory , .How did the geocentric theory change over time as incr...

.How did the geocentric theory change over time as increased scientific knowledge led to increased consensus within the scientific community?.

Fire hazards, Let us recall briefly what all we have learnt about fire haza...

Let us recall briefly what all we have learnt about fire hazards in this unit. Fire accident can happen due .to a number of reasons, like, flammable liquids, faulty electrical and

Explain the adrenal medulla, Explain the Adrenal Medulla The adrenal me...

Explain the Adrenal Medulla The adrenal medulla secretes epinephrine or adrenaline and norepinephrine or noradrenaline. The secretory cells of the medulla are modified postgang

Saturn, Saturn-the  Ringed Planet Saturn, the sixth planet, is the la...

Saturn-the  Ringed Planet Saturn, the sixth planet, is the last one visible to the naked eye. Its rings, visible only through a telescope, make it the most striking and beaut

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