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...
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...
What is the danger of ultraviolet rays?Question: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 ...
According to paragraph 2, what is one difference between Earth and Venus? A. Earth has less water in its atmosphere than Venus does. B. Earth has a hydrologic system, but Venus does not. C. Earth is less geologically active than Venus is. D. Earth has more carbon dioxide than Venus do...
Ultraviolet rays: what the are and how they act.Luigi Arnone
Ultraviolet waves are between 100 and 4000 angstroms (10-400 nanometers). This is shorter than visible light but longer than X-rays and gamma rays. The shorter the wave in the spectrum, the more energy it has and the faster it oscillates. The more energy a wave has, the more ...
As shown in this table, UV-C differs from UV-A and UV-B in the size of its wavelengths. Atlantic Ultraviolet Corporation’sSTER-L-RAY®Germicidal UV lamps produce 95% of their rays at 254 nanometers, the specific wavelength that destroys the DNA structure of harmful bacteria, viruses, ...
What is the main source of ultraviolet radiation? Sunlightis the main source of UV radiation, even though UV rays make up only a small portion of the sun's rays. Different types of UV rays reach the ground in different amounts. About 95% of the UV rays from the sun that reach the ...
1、什么是同步辐射光源?What is a synchrotron radiation light source? " Synchrotron radiation" refers to a continuous band of electromagnetic spectrum including infrared, visible light, ultraviolet, and X-rays. This light has been called "synchrotron radiation", since it was accidentally discovered in...
Theconductancecan vary depending on the current or voltage applied to a control electrode or on the intensity of irradiation by infrared (IR), visible light, ultraviolet or X-rays. The specific properties of a semiconductor depend on the impurities -- known as dopants -- added to it. ...