Radiation - Wikipedia
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium. [1][2] This includes: Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles.
Radiant energy - Wikipedia
In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic [1] and gravitational radiation. As energy, its SI unit is the joule (J). The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time.
Radiation | Definition, Types, Effects, & Facts | Britannica
Radiation may be thought of as energy in motion either at speeds equal to the speed of light in free space—approximately 3 × 10 10 centimetres (186,000 miles) per second—or at speeds less than that of light but appreciably greater than thermal velocities (e.g., the velocities of molecules forming a sample of air).
辐射度量学 - 知乎 - 知乎专栏
辐射能(Radiant energy) Q ：电磁辐射(electromagnetic radiation)的能量，单位是焦耳 J ，用符号表示(很少用在计算机图形学中)： 辐射通量 (Radiant flux)或 功率 (power) \Phi ： 单位时间 释放(emitted)、反射(emitted)、透射(transmitted)或接受(received)的 能量 。
Radiant Energy: Definition, Function, and Examples - Science Facts
2022年7月15日 · Radiant energy, also called electromagnetic radiation, is the energy emitted by electromagnetic waves that travel through space without any medium. It is the energy that can be seen or felt by every living being, meaning it can be both visible and invisible.
What is Radiation? | IAEA - International Atomic Energy Agency
2023年1月25日 · Radiation is energy that moves from one place to another in a form that can be described as waves or particles. We are exposed to radiation in our everyday life. Some of the most familiar sources of radiation include the sun, microwave ovens in our kitchens and the radios we listen to in our cars.
Radiant energy | Light, Heat, Electromagnetic | Britannica
Radiant energy, energy that is transferred by electromagnetic radiation, such as light, X-rays, gamma rays, and thermal radiation, which may be described in terms of either discrete packets of energy, called photons, or continuous electromagnetic waves.
Radiant energy - Energy Education
Radiant energy, also known as electromagnetic radiation (EMR), is energy transmitted without the movement of mass. Practically speaking, this is the energy found in electromagnetic waves, also known as light. Light is made of individual particles called photons, each …
How Radiation Works - HowStuffWorks
2024年4月16日 · Radiation is the emission and transmission of energy in the form of electromagnetic waves or particles. Radiation can be ionizing or nonionizing radiation, and only ionizing radiation has enough energy to potentially cause damage to cells and DNA.
Radiation Basics | US EPA - U.S. Environmental Protection Agency
2024年10月1日 · Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects. There are two kinds of radiation: non-ionizing radiation and ionizing radiation.