百科知識視頻之煎蛋小學堂75 彩虹才不是這樣呢

The rainbow,as we know it,is Red,Organge,Yellow,Green,Blue,Violet.ROYGBV,I'm ignoring Indigo because,let's be honest,Indigo?But where exactly is violet? Is it at the end here?This dark blue? And what's this brighter light blue-green ?Cyan,perhaps?Why don't we say the rainbow is Red Orange Yellow Green Cyan Blue?

彩虹的顏色嘛 當然是紅橙黃綠藍紫 ROYGBV 我把靛省掉了，靛色 逗我呢?那么紫色哪去了呢?是在這深藍色最末端嗎?這個淺藍綠色是啥 青色嘛?為啥我們不說彩虹是紅橙黃綠青藍(木有紫)的呢?

ROYGCB Well,we actually do,and we've just forgotten.When Isaac Newton originally observed a rainbow of light split by a prism and made his labeling of the colors as RedOrangeYellowGreenBlueIndigoViolet,the thing he called "blue"was indeed what we would now call blue-green,teal or cyan-reminiscent of the color of the blue sky.

ROYGCB其實 我們曾經的確這么說，當牛頓最初通過棱鏡觀察散射的彩虹光并為顏色標上“紅橙黃綠藍靛紫”時，他們所說的“藍”是我們今天所指的藍綠色 或說青色 讓人思緒無窮的天空的顏色。

And what we now tend to call blue,Newton called violet as in,roses are red,violets are blue,Dark blue.He only included indigo in his fundamental"seven colors of the rainbow"so that they would match the number of notes of the western musical scale:Do re mi fa so la ti...yeah.

我們今天所說的藍在牛頓口中是“紫”就是 紅玫瑰 紫羅蘭 也就是深藍色。他在“七色彩虹”中引入靛色 只是為了和西方的音樂音階數(shù)量相配：哆來咪發(fā)嗦啦啼 就醬紫。

Purple and magenta,as we know,don't occur in the rainbow from a prism because they can only be made as a combination of red and blue light,and those are on opposite sides of the rainbow,nowhere near overlapping.So there's no purple or hot pink in the rainbow from a prism.Violet is there in the "roses are red,violets are BLUE"sense,but purple is not.

正如我們所知 紫色和品紅并不在棱鏡折射出的彩虹里 因為它們只能通過紅藍光疊加產生，而這兩者在彩虹的兩端 完全不可能疊加嘛。因此 棱鏡折射出的彩虹中沒有紫色或亮粉色。“紅玫瑰 紫羅蘭”中有藍紫色 但沒有紫色。

So then why do rainbows in the sky often look like they have pruple in them? I suspect sometimes it's an optical illusion whereby nice deep blues in small amounts surrounded by a lighter color appear purplish to our eyes.However,sometimes purple and pink really are there,because a rainbow is really a rain-disk:each color of sunlight reflects back in a bright rimmed disc,all of different sizes,which together add up to make a white disk with a colorful rim.

那么 為啥天上的彩虹看上去有紫色呢?我認為 這可能是一種視錯覺 小面積的深藍被亮色環(huán)繞時看碟上去像是紫色。不過 有時紫色和粉色真的出現(xiàn)過，因為彩虹終究還是“彩蝶”，日光中的每一種顏色反射在光邊盤上 環(huán)大小各不相同，它們疊加在一起 形成有著彩色邊緣的白碟。

But because light is a wave,interference from the raindrops themselves actually gives each disk multiple rings:the familiar outer ring is just the brightest.The others are called"supernumerary rings"and are the source of supernumerary rainbows.The smaller the raindrops,the stronger the supernumerary bows.And if the drops are the right size,the first red supernumerary ring can overlap significantly with the main dark blue ring,and what do red and blue give?Purple!

由于光的波動性 兩滴產生的干涉使彩碟出現(xiàn)多個環(huán) 我們所熟悉的外環(huán)是最亮的一個，其他的被稱為“多余環(huán)”是多余虹的起源。雨滴越小 多余虹越明顯。如果雨滴大小恰到好處 第一個紅色多余環(huán)會疊加在主環(huán)的深藍環(huán)上 ，紅加藍等于 紫色!

So as the saying goes,roses are red,violets are blue,and purple in a rainbow is a supernumerary hue.

所以 正如俗話說 紅玫瑰 紫羅蘭，藍紫的彩虹 就是多余環(huán)。