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词汇 Grey body
分类 英语词汇 英语翻译词典
释义

Grey body

原声例句
VOA Special 2019年11月合集

He kicked and shouted as loud as he could. Then a great grey body hit him. It almost rolled him over in the water.

他尽可能地踢打和喊叫，然后一具巨大的灰色身躯击中了他。它差点把他撞翻到水里。

VOA Special 2019年11月合集

He went deep down and looked around. He was about to rise to the top and start swimming when he saw a long grey body below him.

向深处游去，环顾四周。他正要开始游回海面时，看见下面有一个长长的灰色身躯。

中文百科

黑体 (物理学) Black body

（重定向自Grey body）
当黑体的温度降低时，黑体辐射曲线峰值会移向较低强度和更长波长的位置。黑体辐射曲线图可以和经典模型瑞利-金斯定律相比较。
黑体辐射的颜色（色度）设根据黑体的温度变化的；这些颜色的轨迹，如上面的CIE1931色彩空间图所示，为普朗克轨迹（或称为黑体轨迹）。

在热力学中，黑体（英语：Black body），旧称绝对黑体，是一个理想化的物体，它能够吸收外来的全部电磁辐射，并且不会有任何的反射与透射。随着温度上升，黑体所辐射出来的电磁波与光线则称做黑体辐射。这个名词在1862年由克希荷夫所提出并引入热力学内。

英语百科

Black body 黑体 (物理学)

（重定向自Grey body）
As the temperature of a black body decreases, its intensity also decreases and its peak moves to longer wavelengths. Shown for comparison is the classical Rayleigh–Jeans law and its ultraviolet catastrophe.
An approximate realization of a black body as a tiny hole in an insulated enclosure
An idealized view of the cross-section of a star. The photosphere contains photons of light nearly in thermal equilibrium, and some escape into space as near-black-body radiation.
Effective temperature of a black body compared with the B-V and U-B color index of main sequence and super giant stars in what is called a color-color diagram.[36]

A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. A white body is one with a "rough surface [that] reflects all incident rays completely and uniformly in all directions."
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