首页
登录
职称英语
A summary of the physical and chemical nature of life must begin, not on the
A summary of the physical and chemical nature of life must begin, not on the
游客
2023-07-11
15
管理
问题
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun’s very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and heat. This energy is liberated at the center of the Sun as billions upon billions of nuclei of hydrogen atoms collide with each other and fuse together to form nuclei of helium, and, in doing so, release some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converts into helium in the Sun every second. This the Sun has been doing thousands of millions of years.
The nuclear energy is released at the Sun’s center as high-energy gamma radiation, a form of electro magnetic radiation like light as radio waves, only of every much shorter wavelength. This gamma radiation is absorbed by atoms inside the Sun, to be reemitted at slightly longer wavelengths. This radiation, in its turn, is absorbed and reemitted. As the energy filters through the layers of the solar interior, it passes through the x-ray part of the spectrum, eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space, without being absorbed further by solar atoms. A very small fraction of the Sun’s light and heat is emitted in such directions that, after passing unhindered through interplanetary space, it hits the Earth. [br] According to the passage, through which of the following does the energy released in the Sun pass be fore it becomes light?
选项
A、The x-ray part of the spectrum.
B、Electromagnetic space.
C、The solar surface.
D、Interplanetory space.
答案
A
解析
根据第二段第4句,“当能量通过太阳内层过滤时,它穿过光谱的射线部分最终变成光。”由此可知A项为正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2826866.html
相关试题推荐
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
Womenandmendiffernotonlyinphysical【B1】______andreproductivefunction
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
Thefundamental______.whichgovernallphysicalprocessesarealsorelatedto
Ihavebeenstudyingthenatureofthe"loweranimals"andcontrastingitwi
Ihavebeenstudyingthenatureofthe"loweranimals"andcontrastingitwi
随机试题
Mary______thatthepurchasehadbeenamistake.However,shedidn’t.A、oughtto
不能打开HTML源码文件的软件为()。若在网页中需要增加“提交”和“重置”两个
护患交谈中实现共情的方法不包括A.表达尊重 B.表现同情 C.接纳对方的信念
()负责债券融资工具交易的日常监测。A.中国人民银行 B.中国银行间市场交
根据《数字测绘成果质量检查与验收》,有关质量检查结果的描述正确的是( )。A.
临床药学、药学情报和处方调配等药学活动主要体现了药学部(科)工作性质的()。A
按骨折的程度可将骨折分为A.闭合性骨折和开放性骨折 B.不完全骨折和完全骨折
基金管理人的下列行为中,不属于违规行为的是()。A:在规定范围和比例内,将其管理
某女,30岁。出血量多,日久而止,气短神疲,面浮肢肿,手足不温,大便溏。舌淡苔薄
在220kV电力架空线路杆塔()范围内不得挖取黏土。A.5m B.10m
最新回复
(
0
)