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Why is that even for incident radiation that is monochromatic the photoelectrons are emitted with a range of velocities?
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Does black absorb or reflect?
Black absorbs radiation. A perfectly black body would absorb all the radiation that is incident upon it.
What is difference between emitted radiation heat and reflected radiation heat?
The magnitude of the incident angle with the normal of the reflection surface and reflection angle with the normal of the surface are the same. The direction of the reflection is away form the surface and the incident is toward the surface.
Greenhouse effect events in order starting with lights origin?
Incident infrared radiation is blocked. Visible and ultraviolet radiation heat Earth. Earth radiates infrared radiation. Infrared radiation is blocked and heats Earth. Visible and shortwave radiation heat Earth.Earth radiates longwave radiationLongwave radiation is reflected downward Longwave radiation heats Earth
What is the difference between reflectivity and reflectence?
reflectivity is the fraction of incident radiation reflected by a surface. In general it must be treated as a directional property that is a function of the reflected direction, the incident direction, and the incident wavelength. However it is also commonly averaged over the reflected hemisphere to give the hemispherical spectral reflectivity:reflectance a measure of the ability of a surface to reflect light or other electromagnetic radiation, equal to the ratio of the reflected flux to the incident flux.
Can the work function depend upon the wavelength of light?
Yes, definitely . For the given metal of particular work function, decrease in wavelength of the incident beam increases the maximum value of kinetic energy with which the photoelectrons are emitted, but the photoelectric current remains the same, stoppage voltage increases.
What is incident radiation?
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.)
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.
What is raman effect?
raman effect states that when a monochromatic light is passed through a substance,it attains some additional frequencies other than its incident frequency.
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.
Does black absorb or reflect?
Black absorbs radiation. A perfectly black body would absorb all the radiation that is incident upon it.
Most of the radiation incident upon the Earth falls within the?
the shortwave spectrum
What is difference between emitted radiation heat and reflected radiation heat?
The magnitude of the incident angle with the normal of the reflection surface and reflection angle with the normal of the surface are the same. The direction of the reflection is away form the surface and the incident is toward the surface.
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 causing atmospheric circulation on Earth?
The Earthly Incident Radiation from the Sun is almost exclusively responsible for this.
Greenhouse effect events in order starting with lights origin?
Incident infrared radiation is blocked. Visible and ultraviolet radiation heat Earth. Earth radiates infrared radiation. Infrared radiation is blocked and heats Earth. Visible and shortwave radiation heat Earth.Earth radiates longwave radiationLongwave radiation is reflected downward Longwave radiation heats Earth
