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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.
When a solid is heated it emits electromagnetic radiation known as An example of such radiation is the element of a stove stop burning bright red?
When a solid is heated, it emits electromagnetic radiation called thermal radiation. An example of this is when the element of a stove burner heats up and glows red hot, emitting visible light as thermal radiation. This phenomenon is governed by Planck's law of blackbody radiation.
How did max planck called an object radiated energy?
Max Planck called an object radiating energy a "blackbody." He developed a theoretical model to explain the energy distribution of radiation emitted by a blackbody at different temperatures, leading to the development of quantum theory.
between white and silver surfaces, which one is the best emitter of radiation?
The best emitter of radiation depends on the type of radiation you are referring to. Generally, when discussing thermal radiation, a "blackbody" is considered the best emitter. A blackbody is an idealized object that absorbs all incident radiation and emits radiation perfectly according to its temperature. In real-world scenarios, there is a concept called "emissivity," which quantifies how effectively an object emits thermal radiation compared to a blackbody at the same temperature. The emissivity of an object ranges between 0 and 1, with 1 being a perfect blackbody. Regarding white and silver surfaces: White surfaces: White surfaces tend to have high reflectivity and low emissivity. This means they are good at reflecting incoming radiation and do not emit thermal radiation as effectively. In terms of thermal radiation emission, they are not the best emitters. Silver surfaces: Silver surfaces also have high reflectivity but generally have higher emissivity compared to white surfaces. They emit more thermal radiation than white surfaces, but they are still not as effective emitters as a perfect blackbody. In conclusion, between white and silver surfaces, silver surfaces would be the better emitter of thermal radiation due to their higher emissivity. However, neither of them is as efficient as a blackbody emitter. Keep in mind that the exact emissivity values can vary based on the specific properties and conditions of the materials used.
Is any lava blue?
No. The glow of lava is a product of something called blackbody radiation. At the temperatures that lava reaches, it can't produce more than a red glow. Blue blackbody radiation requires extremely high temperatures not even found in Earth's core. One article discussed "blue lava" from one volcano. In reality it was not lava but molten sulfur, which caught fire and burned with a blue flame.
What is the Stefan-Boltzmann radiation law?
The rate of energy emitted by an ideal surface, frequently called a blackbody, is given by the following relationship: E = KsbT4 where T is absolute temperature & Ksb is the Stefan-Boltzamnn constant which is 0.567 x 10-9 W/mK4
Why are lasers called lasers?
Laser was originally an acronym, for "light amplification through stimulated emision of radiation".
What are black surfaces called?
Black surfaces that absorb all light and reflect no light are called "blackbodies." A blackbody is a theoretical object that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
If a helium ion is emmited during the disintegration of a nucleus what kind of decay is this called?
Nuclear emission of a helium ion is called alpha decay.
Why do stars vary in colors?
It is a consequence of something called blackbody radiation. Any object that is not at absolute zero emits electromagnetic radiation. The higher the temperature the cooler At temperatures we usually fin on Earth that radiation is in the infrared range. Hot enough objects emit much of their radiation as visible light. The coolest stars emit mostly red light, which has the longest wavelength of visible light. The hottest stars are blue, as blue light has a shorter wavelength.
What is a blackbody radiator?
Blackbody raditaition is a form of electromagnetic energy that is created from a blackbody (something that reflects or absorbs all incident energy). If a blackbody is in thermodynamic equilibrium (constant non-changing temp. 0 net force) it will radiate blackbody radiation which changes with temperature. Higher temp. calls for shorter wavelengths and higher intensity. The hue is generally infared and cant be seen. some times you can see a faint red or orange glow. glad to answer.
Dispersing light from a hot wire which emits white light gives what type of spectrum is it?
A hot, glowing wire emits all wavelengths (or colors) of light. This is sometimes called "blackbody radiation." Since all colors are present, you will get a continuous spectrum.
