terahertz radiation

(noun)

Electromagnetic waves with frequencies around one terahertz.

Related Terms

Examples of terahertz radiation in the following topics:

  • Microwaves

    • The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary.
    • EHF runs the range of frequencies from 30 to 300 gigahertz, above which electromagnetic radiation is considered as far infrared light, also referred to as terahertz radiation.
    • The sun also emits microwave radiation, although most of it is blocked by Earth's atmosphere.
    • The Cosmic Microwave Background Radiation (CMBR) is microwave radiation that permeates all of space, and its discovery supports the Big Bang theory of the origin of the universe.
    • Cosmic background radiation of the Big Bang mapped with increasing resolution.

  • Electromagnetic Spectrum

    • The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
    • The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
    • Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, terahertz (or sub-millimeter) radiation, infrared, the visible region we perceive as light, ultraviolet, X-rays, and gamma rays.
    • The behavior of electromagnetic radiation depends on its wavelength.
    • Electromagnetic radiation interacts with matter in different ways in different parts of the spectrum.

  • Photon Energies of the EM Spectrum

    • The electromagnetic (EM) spectrum is the range of all possible frequencies of electromagnetic radiation.
    • The electromagnetic (EM) spectrum is the range of all possible frequencies of electromagnetic radiation .
    • Generally, electromagnetic radiation is classified by wavelength into radio waves, microwaves, terahertz (or sub-millimeter) radiation, infrared, the visible region humans perceive as light, ultraviolet, X-rays, and gamma rays.
    • The behavior of EM radiation depends on its wavelength.
    • Also, radiation from various parts of the spectrum has many other uses in communications and manufacturing.

  • Acute Radiation Damage

    • Acute radiation syndrome or damage describes health effects present within 24 hours of exposure to high amounts of ionizing radiation.
    • Acute radiation syndrome, also known as radiation poisoning, radiation sickness, or radiation toxicity, is a constellation of health effects that are present within 24 hours of exposure to high amounts of ionizing radiation, which can last for several months.
    • Radiation sickness is caused by exposure to a large dose of ionizing radiation over a short period of time, typically greater than about 0.1 Gy/h.
    • The onset and type of symptoms depends on the radiation exposure.
    • These diseases are sometimes referred to as radiation sickness, but they are never included in the term acute radiation syndrome.

  • Increased Cancer Risk from Radiation

    • Up to 10 percent of invasive cancers are related to radiation exposure, including both ionizing radiation and non-ionizing radiation.
    • Up to 10 percent of invasive cancers are related to radiation exposure, including both ionizing radiation and non-ionizing radiation.
    • The most widely accepted model posits that the incidence of cancer due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5 percent per sievert.
    • If the linear model is correct, natural background radiation is the most hazardous source of radiation to the general public health, followed closely by medical imaging.
    • Cancer is a stochastic effect of radiation, meaning that the probability of occurrence increases with effective radiation dose, but the severity of the cancer is independent of dose.

  • Therapeutic Uses of Radiation

    • Radiation therapy uses ionizing radiation to treat conditions such as hyperthyroidism, cancer, and blood disorders.
    • Radiation therapy involves the application of ionizing radiation to treat conditions such as hyperthyroidism, thyroid cancer, and blood disorders.
    • Ionizing radiation works by damaging the DNA of exposed tissue, leading to cellular death.
    • Radiation therapy is in itself painless.
    • Radiation therapy of the pelvis.

  • Medical Imaging and Diagnostics

    • Radiation therapy uses ionizing radiation to treat conditions such as hyperthyroidism, cancer, and blood disorders.
    • Radiation therapy involves the application of ionizing radiation to treat conditions such as hyperthyroidism, thyroid cancer, and blood disorders.
    • Ionizing radiation works by damaging the DNA of exposed tissue, leading to cellular death.
    • Radiation therapy is in itself painless.
    • Radiation therapy of the pelvis.

  • Planck's Quantum Hypothesis and Black Body Radiation

    • A black body emits radiation called black body radiation.
    • Planck described the radiation by assuming that radiation was emitted in quanta.
    • A black body in thermal equilibrium (i.e. at a constant temperature) emits electromagnetic radiation called black body radiation.
    • Max Planck, in 1901, accurately described the radiation by assuming that electromagnetic radiation was emitted in discrete packets (or quanta).
    • Contrary to the common belief that electromagnetic radiation can take continuous values of energy, Planck introduced a radical concept that electromagnetic radiation was emitted in discrete packets (or quanta) of energy.

  • Measuring Radiation Exposure

    • Radiation dosimetry is the measurement and calculation of the absorbed dose from exposure to indirect and direct ionizing radiation.
    • Radiation dosimetry is the measurement and calculation of the absorbed dose in matter and tissue resulting from exposure to indirect and direct ionizing radiation.
    • Radiation dose refers to the amount of energy deposited in matter and/or biological effects of radiation.
    • There are several ways of measuring doses from ionizing radiation, including personal dosimeters and ionization chambers.
    • Define the terms used to define radiation exposure, the gray (Gy) and sievert (Sv)

  • Radiation

    • In these examples, heat is transferred by radiation.
    • There is a clever relation between the temperature of an ideal radiator and the wavelength at which it emits the most radiation.
    • The rate of heat transfer by emitted radiation is determined by the Stefan-Boltzmann law of radiation:
    • If you knock apart the coals of a fire, there is a noticeable increase in radiation due to an increase in radiating surface area.
    • A black object is a good absorber and a good radiator, while a white (or silver) object is a poor absorber and a poor radiator.