Ultraviolet, X-rays, and gamma rays are all waves that are shorter than violet on the light spectrum. While all three can be damaging to humans, ultraviolet waves have become the most well-known. The most harmful ultraviolet waves are kept out by the Earth's atmosphere, but some are able...
Ultraviolet rays: what the are and how they act.Luigi Arnone
A. Ultraviolet rays. B. Human vision. C. Sight and smell. D. The E. nvironment of primates. 相关知识点: 试题来源: 解析 B 正确答案:B 解析:文章第一句就点明整体,全篇讨论人类的视觉问题,因此,正确答案为B。结果一 题目 What does the passage mainly discuss? A. The present and past times...
Ultraviolet (UV) occupies the electromagnetic spectrum between X-rays and visible light. The sun emits ultraviolet rays. However, most of them are absorbed by the earth's ozone layer. Just as visible light consists of different colors in a rainbow, the ultraviolet radiation spectrum is divided i...
What is the danger of ultraviolet rays?Radiation:Radiation is an energy that originates from a source and moves through space at the speed of light. Alpha, neutron, beta, and electromagnetic waves, like X-rays and gamma rays, are four major types of radiation....
[#insert3] Because Venus receives more heat from the Sun, water released from the interior evaporated and rose to the upper atmosphere where the Sun’s ultraviolet rays broke the molecules apart. [#insert4] Much of the freed hydrogen escaped into space, and Venus lost its water. Without ...
UV-C should be the final step before use. It is intended to treat visually clear water that is not colored, cloudy, or turbid. Learn more aboutUV water purifier operation. When used for surface disinfection, multiple treatment cycles may be required for places where UV rays are obstructed. ...
• Tardigrades may protect themselves from harmful UV rays by making themselves fluorescent. Tardigrades, often called water bears or moss piglets, are tiny aquatic animals. Under a microscope, you can see their plump, segmented bodies and flat heads. They have eight legs, each tipped with fo...
X-rays are roughly classified into soft X-rays and hard X-rays. Soft X-rays have relatively short wavelengths of about 10 nanometers (a nanometer is one-billionth of a meter), and so they fall in the range of the electromagnetic (EM) spectrum between ultraviolet (UV) light and gamma-ra...
You should already know that the best way to protect your eyes from the sun’s damaging ultraviolet (UV) rays is to wear sunglasses when outside, but just how much UV protection do you need? The answer lies within the numbered rating, and the highest UV protection rating offered is UV ...