Asked in Physics
Is a good absorber of radiation a good emitter or a poor emitter?
It is a good emitter, as you can not have a good absorber, which isn't a good emitter. Dark, Matt surfaces are good emitters and absorbers e.g. a saucepan. ...
Asked in Evaporation and Condensation
Why are carbon dioxide and water vapor called selective absorbers?
Any object that can specifically absorb and emit radiation (in the form of, say, infrared radiation), is called a selective absorbers. An example is: Snow. It is a good absorber of infrared radiation but poor absorber of sunligh. Object that selectively absorb radiation at some wavelength tend to radiate radiation at that same wavelength. CO2 and water vapors are both very good absorber of infrared radiation but at the same time poor absorber of different forms of solar radiation that are visible to us. ...
What material is best absorber of infrared radiation?
a black body can absorb any type of radiation . it is the best absorber for any type of radiation than any other material . ...
Why does a good emitter of heat radiation appear black at room temperature?
This is related to the fact that a good emitter must needs also be a good absorber. ...
Asked in Physics, Electromagnetic Radiation
Is a good absorber of radiation a good emitter of radiation also?
I would say *yes*. This is Kirchoff's law, which states that absorptivity=emissivity in all cases. Reference: Incropera & DeWitt 'Heat Transfer' ...
Asked in Physics
Can an object be both a good absorber and good reflector at the same time why or why not?
No, you can be both good and evil. This is the same concept. The object is either a good absorber or a good reflector, and can not be both. Black is a good absorber, white is a good reflector. ...
Asked in Energy, Solar Power, Green Living
What are the materials used for absorbing solar energy?
Any good absorber or conductor of short wave radiation like air, black substances etc. absorbs solar radiation finely as the sun emits short waves in the form of solar radiation. ...
Is a good absorber of radiation a good emitter of radiation .why?
Yes. As for the reasons, one of them is that if this were not so, the Second Law of Thermodynamics would be violated, because two side-by-side objects, one black, one white, would develop a temperature difference. ...
If you have to make a small building that absorbes shock is drywall a good shock absorber?
No drywall is not a good shock absorber. It's too rigid.
Why do people who work with radioactive substance wear lead jackets?
Lead being a heavy element is a good absorber of radiation, so provides protection to vital organs of the body ...
Asked in Energy
Why does a good absorber of radiant energy appear black?
A2. Well, not always. The Oceans are a good absorber of radiant energy. It is just that Matt black things are good absorbers (and emitters) of radiant energy. Black is a good absorber of radiant energy because unlike white it does not reflect light but absorbs it. ...
Asked in Atmospheric Sciences, Energy
What type of radiator of energy is an object that is a good absorber of radiation?
An object that absorbs heat well will also emit heat well. The object will emit heat until equilibrium is reached with its surroundings. ...
What is known primarily as a selective absorber of ultraviolet radiation?
Silicon dioxide can be doped to selectively absorb or pass narrow ranges of UV radiation. Calcium fluoride is another excellent candidate. ...
Did black colour is a good absorber of heat or a good conductor?
Dark (especially black) surfaces absorb infra-red well. White and silver surfaces reflect radiation.so its a good absorber. However,conductivity depends on the metal being used. ...