Infrared
Infrared radiation is invisible to us and emitted by the human body.
Most of the radiation that produces a black body spectrum is emitted from the surface of the object itself. This radiation is a result of thermal vibrations of the atoms and molecules on the object's surface, which generate a continuous spectrum of electromagnetic radiation across various wavelengths.
The radiation emitted by a body that absorbed it first is known as re-emitted or secondary radiation. This occurs when absorbed energy is re-radiated by the object in a different form such as heat or light.
Gamma radiation is considered the most deadly type of radiation as it is highly penetrating and can easily damage tissues and cells in the body. This type of radiation is emitted during nuclear reactions and explosions.
The human body naturally emits low levels of infrared radiation, also known as heat energy. This is due to the body's heat production through metabolic processes.
Infrared radiation is invisible to us and emitted by the human body.
Most of the radiation that produces a black body spectrum is emitted from the surface of the object itself. This radiation is a result of thermal vibrations of the atoms and molecules on the object's surface, which generate a continuous spectrum of electromagnetic radiation across various wavelengths.
The radiation emitted by a body that absorbed it first is known as re-emitted or secondary radiation. This occurs when absorbed energy is re-radiated by the object in a different form such as heat or light.
Gamma radiation is considered the most deadly type of radiation as it is highly penetrating and can easily damage tissues and cells in the body. This type of radiation is emitted during nuclear reactions and explosions.
The human body naturally emits low levels of infrared radiation, also known as heat energy. This is due to the body's heat production through metabolic processes.
Infrared light is emitted by warm objects, such as the human body, animals, and electronics. These objects emit infrared radiation as heat energy that is invisible to the human eye but can be detected by special sensors or cameras.
Two examples of infrared waves are heat radiation emitted by the human body and infrared sensors in TV remotes.
The amount of radiation emitted by a hot body is directly proportional to the fourth power of its temperature (Stefan-Boltzmann law). Therefore, if the temperature of a hot body is increased by 50 units, the amount of radiation emitted will increase by a factor of (1+50/old temp)^4.
Gamma radiation
The temperature of the body. As the temperature of the body increases, the wavelength of the radiation emitted decreases, shifting towards shorter wavelengths. This relationship is described by Wien's displacement law.
The black body radiation graph represents the intensity of radiation emitted by an object at different wavelengths. It relates to the concept of thermal radiation because it shows how an object's temperature affects the distribution of emitted radiation. As an object gets hotter, it emits more radiation at shorter wavelengths, which is known as thermal radiation.
The total radiation emitted by a black body is proportional to the fourth power of its absolute temperature according to Stefan-Boltzmann law. Therefore, if the absolute temperature of a black body is doubled, the total radiation emitted will increase by a factor of 16.