Why do doctors wear green or blue scrubs?
Asks Jillian from Philadelphia
Snazzy green or blue scrubs may have substance in addition to style. [Illustration: Molika Ashford]
| Posted September 1, 2008
Posted in: ,
** Editor’s Note: The staff of Scienceline is taking a short break to work on future stories. This article originally appeared July 21, 2008.**
Scrubs used to be white—the color of cleanliness. Then in the early twentieth century, one influential doctor switched to green because he thought it would be easier on a surgeon’s eyes, according to an article in a 1998 issue of Today’s Surgical Nurse. Although it is hard to confirm whether green scrubs became popular for this reason, green may be especially well-suited to help doctors see better in the operating room because it is the opposite of red on the .
Green could help physicians see better for two reasons. First, looking at blue or green can refresh a doctor’s vision of red things, including the bloody innards of a patient during surgery. The brain interprets colors relative to each other. If a surgeon stares at something that’s red and pink, he becomes
to it. The red signal in the brain actually fades, which could make it harder to see the nuances of the human body. Looking at something green from time to time can keep someone’s eyes more sensitive to variations in red, according to John Werner, a psychologist who studies vision at the University of California, Davis.
Second, such deep focus on red, red, red can lead to distracting green illusions on white surfaces. These funky green ghosts could appear if a doctor shifts his gaze from reddish body tissue to something white, like a surgical drape or an anesthesiologist’s alabaster outfit. A green illusion of the patient’s red insides may appear on the white background. (You can try out this
yourself.) The distracting image would follow the surgeon’s gaze wherever he looks, similar to the floating spots we see after a camera flash.
The phenomenon occurs because white light contains all the colors of the rainbow, including both red and green. But the red pathway is still tired out, so the red versus green pathway in the brain signals “green.”
However, if a doctor looks at green or blue scrubs instead of white ones, these disturbing ghosts will blend right in and not become a distraction, according to Paola Bressan, who researches visual illusions at the University of Padova in Italy.
So, although doctors trot down the street these days in a
of patterned and colored scrubs, green may be a doctor’s best bet.
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＞＞＞阅读理解。 What is color? Why do some of the things around ..
阅读理解。
&&& What is color? Why do some of the things around us look red, some green, others blue? &&& Colors are really made by deflected (反射) light. We see color because most of the things reflect light.In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn't reflect any light, it is black. Some of the light is reflected and some is taken in (吸引) and turned into (变成) heat (热能). The darker the color is, the less light is reflected, the more light is taken in. So dark-colored clothes are warmer in the sun than light-colored clothes.
1. When something reflects light, we can _____.
A. see its color B. see its heat C. not see its color
2. Something looks white because it reflects _____.
A. some light B. no light C. all light
3. The dark-colored clothes are warm because&&&&&&&&& &is taken in.
A. more light B. less lightC. more color
4. In summer _____ make people feel cool.
A. dark-colored clothes B. red-colored clothes C. light-colored clothes
5. What's the best title (标题) of this passage (短文)?
A. Dark color B. Color C. Clothes
题型：阅读理解难度：中档来源：同步题
1-5: ACACB
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据魔方格专家权威分析，试题“阅读理解。 What is color? Why do some of the things around ..”主要考查你对&&科教类阅读&&等考点的理解。关于这些考点的“档案”如下：
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科教类阅读
科普类的阅读：科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时，要以事实为中心进行思考，抓住事物的特征、用途、相互关系等。如果是介绍社会现象的文章，要掌握所谈现象的内涵。答题技巧：1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和&& 关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。 2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。 3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。
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Why do Wint-O-Green Life Savers spark in the dark?
A roll of Life Savers is seen in a grocery Tim Boyle/Getty Images
Actually, all hard sugar-based candies emit some degree of
when you bite them, but most of the time, that light is very faint. This effect is called triboluminescence, which is similar to the electrical charge build-up that produces , only much less grand. Triboluminescence is the emission of light resulting from something being smashed or torn. When you rip a piece of tape off the roll, it will produce a slight glow for the same reason.
Triboluminescence occurs when molecules, in this case crystalline , are crushed, forcing some electrons out of their atomic fields. These free electrons bump into nitrogen molecules in the air. When they collide, the electrons impart energy to the nitrogen molecules, causing them to vibrate. In this excited state, and in order to get rid of the excess energy, these nitrogen molecules emit light -- mostly , but they do emit a small amount of
as well. This is why all hard, sugary candies will produce a faint glow when cracked.
But when you bite into a Wint-O-Green Life Saver, a much greater amount of visible light can be seen.
This brighter light is produced by the wintergreen flavoring. Methyl salicylate, or oil of wintergreen, is , meaning it absorbs light of a shorter
and then emits it as light of a longer wavelength. Ultraviolet light has a shorter wavelength than visible light. So when a Wint-O-Green Life Saver is crushed between your teeth, the methyl salicylate molecules absorb the ultraviolet, shorter wavelength light produced by the excited nitrogen, and re-emit it as light of the visible spectrum, specifically as blue light -- thus the blue sparks that jump out of your mouth when you crunch on a Wint-O-Green Life Saver.
Here are some interesting links:
Mythbusters: Diet Coke and Mentos
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Weird & WackyWhat is color? Why do some of the things around us look red,..._百度知道
What is color? Why do some of the things around us look red,...
&nbsp, it is white.
A. If somethin&nbsp. see nothing
2. more lightB?
A. see its heatC. The darker the color is. some lightB. Which is the best title (题目)
of this passage. less light
3, if something is green it reflects most of the green light. In the same way.
1;&nbsp. Dark ColorB;&nbsp. So dark-colored (深色的)
clothes are warmer in the sun than light-colored (浅色的)& What is color
阅读理解. We see colors because most of the things reflect light. light-colored
5;&nbsp. Something looks white because it reflects _____; Some of the light is reflected and some is taken in (吸收) and turned into heat. The dark-colored clothes are warm because _____ is taken in. not see its colorD. less lightC, others blue. green-coloredD. red-coloredC, we can _____. In summer _____ clothes make people feel cool. dark-coloredB. see its colorB;&nbsp. less color
4;&nbsp, the less light is reflected and the more light is taken in. more colorD, some green, because it reflects m&nbsp.
&nbsp. HeatD.
A. Something is red.
A. ColorC?&nbsp. all lightD. When something reflects light. no lightC.& Colors are really made by reflected light
(反射光线)? Why do some of the things around us look red
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出门在外也不愁What do students do at green high school? 这篇文章什么意思？_百度知道
What do students do at green high school? 这篇文章什么意思？
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No students
homework once or twice a week 。对于看电视的调查结果是很有趣的, some students watch Tv three or four times a week. The results for &quot。大多数学生一周锻炼三到四次.
exerciseonce or twice a week .Some
students are very active。还有一些学生是很具有活力的并且每天都锻炼, but most
students watch Tv
every day.Some students watch Tv once or twice week，但是大多数学生每天都看电视Here are the results of the student activity are interesting 。一些学生一周做三到四次作业, Most students do homework
every day 。一些学生一周锻炼一到两次. some
three or four times a week ，大多数的学生每天按时完成.Most students exercise three or four times a week。至于家庭作业，一些学生一周看一到两次电视;watch Tv&quot。没有学生一周做一到两次作业, and exercise every day. As for homework .
这是学生在格林高中活动报告的结果，还有一些学生一周看三到四次电视
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格林高中的学生都做什么事情？
Here are the results of the student activity survey at Green High School. Most students
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