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  2. Microwave imaging - Wikipedia

    en.wikipedia.org/wiki/Microwave_imaging

    Microwave imaging is a science which has been evolved from older detecting/locating techniques (e.g., radar) in order to evaluate hidden or embedded objects in a structure (or media) using electromagnetic (EM) waves in microwave regime (i.e., ~300 MHz-300 GHz). [1] Engineering and application oriented microwave imaging for non-destructive ...

  3. Cosmic microwave background - Wikipedia

    en.wikipedia.org/wiki/Cosmic_microwave_background

    The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dark. However, a sufficiently sensitive radio telescope detects a faint background glow that is almost ...

  4. Microwave oven - Wikipedia

    en.wikipedia.org/wiki/Microwave_oven

    Manufacturer. Various. Available. Globally. A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to vibrate [2] and produce thermal energy in a process known as dielectric heating.

  5. 1.1.1-Propellane - Wikipedia

    en.wikipedia.org/wiki/1.1.1-Propellane

    The molecular structure consists of three rings of three carbon atoms each, sharing one C–C bond. [1.1.1]Propellane is a highly strained molecule. The bonds of the two central carbon atoms have an inverted tetrahedral geometry, and the length of the central bond is 160 pm. The strength of that bond is disputed; estimates vary from 59–65 ...

  6. Wavenumber - Wikipedia

    en.wikipedia.org/wiki/Wavenumber

    In the physical sciences, the wavenumber (or wave number), also known as repetency, [1] is the spatial frequency of a wave, measured in cycles per unit distance (ordinary wavenumber) or radians per unit distance (angular wavenumber). [2][3][4] It is analogous to temporal frequency, which is defined as the number of wave cycles per unit time ...

  7. HKUST-1 - Wikipedia

    en.wikipedia.org/wiki/HKUST-1

    HKUST-1 (HKUST ⇒ H ong K ong U niversity of S cience and T echnology), [1] which is also called MOF-199, [2] is a material in the class of metal-organic frameworks (MOFs). Metal-organic frameworks are crystalline materials, in which metals are linked by ligands (so-called linker molecules) to form repeating coordination motives extending in ...

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