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Radiation is a general term for the energy transmitted through space.
Incident radiation is a term used when referring to the radiation hitting a specific surface. For instance, the incident radiation for a solar panel is the total amount of radiation hitting the surface of the solar panel. This is in contrast to direct beam radiation which refers to only that radiation which arrives in a strait line from the sun. (It differs in that total incident radiation includes additionally the component of diffuse radiation.)
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What is a perfect absorber or emitter of radiation called?
A perfect absorber or emitter of radiation is called a blackbody. It absorbs all incident radiation regardless of wavelength or direction, and emits radiation at the maximum possible level for a given temperature.
What is difference between emissivity and reflectance?
Emissivity refers to the efficiency with which an object emits thermal radiation, ranging from 0 to 1. Reflectance, on the other hand, pertains to the ability of a surface to reflect light or radiation, also ranging from 0 to 1. In essence, emissivity relates to the emission of radiation from an object, while reflectance involves the reflection of incident light.
Why is measurement made at right angles to the direction of the incident radiation in luminescence spectroscopy?
In luminescence spectroscopy, measurements are taken at right angles to the direction of the incident radiation to minimize the detection of scattered light and enhance the signal from emitted luminescence. This configuration helps to reduce background noise and improves the signal-to-noise ratio, allowing for more accurate measurements of the emitted light. Additionally, it ensures that the detected signal is primarily due to the sample's luminescence rather than reflections or scattering from the excitation source.
Why is it cold at the poles?
The answer to this question involves the angle at which solar radiation is intercepted by the earth's atmosphere. The rule is that if solar radiation is incident perpendicular to the atmosphere the solar radiation that is incident on the earth's surface will be greatest. Incoming solar radiation at the poles comes in at a sharper angle and is spread over a greater surface area of atmosphere than at the equator. In this way, the poles have more of an atmospheric filter and experience less radiation per area time and hence have lower average temperatures.
What does the half-life of the radioactive material have to do with the incident at chernobyl?
How long before people can safely return to the area. Much like a nuclear bomb, it has a period where the area should not be populated, by plants or animals due to the amount of radiation, which can cause death
How do you measure incident radiation?
Incident radiation can be measured using instruments such as a radiometer or a photodiode. These devices can quantify the intensity and wavelength of the radiation. The units typically used to measure incident radiation are watts per square meter (W/m^2).
What is an absorptance?
An absorptance is a ratio measuring absorbed radiation and incident radiation - to show how well a particular surface absorbs radiation.
How does the greenhouse effect work relative to earth's energy balance?
The balance of incident Solar radiation as compared to the Re-Radiation of the same incident Solar radiation is skewed so that the Re-Radiation is cancelled and the Heat - easily in infra-red form - is Retained at and by the Earth.
Most of the radiation incident upon the Earth falls within the?
Most of the radiation incident upon the Earth falls within the visible and near-infrared portions of the electromagnetic spectrum.
What is the relationship between absorbance intensity of incident radiation and intensity of transmitted radiation?
The relationship between absorbance intensity of incident radiation and intensity of transmitted radiation is inverse. As absorbance increases, transmitted intensity decreases. This is due to the absorption of light energy by the material, leading to a reduction in the amount of light passing through it.
How can the frequency of incident radiation be varied?
The frequency of incident radiation can be varied by changing the energy level of the source emitting the radiation. For example, in the case of electromagnetic radiation like light, increasing the energy of the source (such as a higher voltage in the case of X-rays) will result in higher frequency radiation. Similarly, for radioactive decay processes, the frequency of emitted radiation can be controlled by manipulating the radioactive material's properties.
What is the definition of radiation use efficiency and light use efficiency?
radiation use efficiency is the percentage part of incident solar radiation spectrum being utilized by plants.
What is incoming solar radiation called?
incident ray i think
Definition of fluorescence?
The visible or invisible radiation emitted by certain substances as a result of incident radiation of a shorter wavelength such as X-rays or ultraviolet light.
What is a perfect black body?
A perfect blackbody absorbs all radiation incident on it and It emits electromagnetic radiation in the form of thermal radiation from its surface. OR A perfect blackbody is a perfect emitter and perfect absorber.
What is a perfect absorber or emitter of radiation called?
A perfect absorber or emitter of radiation is called a blackbody. It absorbs all incident radiation regardless of wavelength or direction, and emits radiation at the maximum possible level for a given temperature.
What is causing atmospheric circulation on Earth?
The Earthly Incident Radiation from the Sun is almost exclusively responsible for this.
