enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Grating - Wikipedia

    en.wikipedia.org/wiki/Grating

    The grating profile is the function of the reflectance or transmittance perpendicular to the lines. This function is generally a square wave, in that every transition between lines is abrupt. A grating can be defined by six parameters: Spatial frequency is the number of cycles occupying a particular distance (e.g. 10 line pairs per millimeter ...

  3. Grate heater - Wikipedia

    en.wikipedia.org/wiki/Grate_heater

    This is a large and powerful grate heater system that incorporates a large, thermally-conductive heating design along with a multi-blower, high-CFM, forced-air delivery system Another example of a large and powerful grate heater system that incorporate a large, thermally-conductive heating design and a single-blower, high-CFM, forced-air delivery system

  4. Echelle grating - Wikipedia

    en.wikipedia.org/wiki/Echelle_grating

    An echelle grating (from French échelle, meaning "ladder") is a type of diffraction grating characterised by a relatively low groove density, but a groove shape which is optimized for use at high incidence angles and therefore in high diffraction orders. Higher diffraction orders allow for increased dispersion (spacing) of spectral features at ...

  5. Heating system - Wikipedia

    en.wikipedia.org/wiki/Heating_system

    Distributed heating systems: These systems generate heat in the space they are to heat, without extensive duct systems. Examples include electric space heaters, fireplaces, and solar heating. [3] Heat pumps: They can be used for heating and cooling, transferring heat using refrigerant and electricity, making them more efficient than other ...

  6. Chemical thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Chemical_thermodynamics

    Breaking and making chemical bonds involves energy release or uptake, often as heat that may be either absorbed by or evolved from the chemical system. Energy released (or absorbed) because of a reaction between chemical substances ("reactants") is equal to the difference between the energy content of the products and the reactants.

  7. Blazed grating - Wikipedia

    en.wikipedia.org/wiki/Blazed_grating

    A special form of a blazed grating is the echelle grating. It is characterized by particularly large blaze angle (>45°). Therefore, the light hits the short legs of the triangular grating lines instead of the long legs. Echelle gratings are mostly manufactured with larger line spacing but are optimized for higher diffraction orders.

  8. Diffraction grating - Wikipedia

    en.wikipedia.org/wiki/Diffraction_grating

    A blazed diffraction grating reflecting only the green portion of the spectrum from a room's fluorescent lighting. For a diffraction grating, the relationship between the grating spacing (i.e., the distance between adjacent grating grooves or slits), the angle of the wave (light) incidence to the grating, and the diffracted wave from the grating is known as the grating equation.

  9. Thermodynamic system - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_system

    Rigid boundary – not allowing exchange of work: A mechanically isolated system; One example is fluid being compressed by a piston in a cylinder. Another example of a closed system is a bomb calorimeter, a type of constant-volume calorimeter used in measuring the heat of combustion of a particular reaction. Electrical energy travels across the ...