enow.com Web Search

Search results

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

    en.wikipedia.org/wiki/Atmospheric_focusing

    The shock wave is impacted by what the meteor is made of, temperature, and pressure. [1] Because the meteors need to have a large size and mass, there is only a small percentage of meteors that can create these shock waves. [2] Radar and Infrasonic methodologies are able to detect meteor shock waves. These tools are used to study these shock ...

  3. Schlieren photography - Wikipedia

    en.wikipedia.org/wiki/Schlieren_photography

    Shock waves produced by a T-38 Talon during flight using analog background-oriented schlieren. Background-oriented schlieren technique (BOS [7]) relies on measuring or visualizing shifts in focused images. In these techniques, the background and the schlieren object (the distortion to be visualized) are both in focus and the distortion is ...

  4. Schlieren - Wikipedia

    en.wikipedia.org/wiki/Schlieren

    Toepler's original system [2] was designed to detect schlieren in glass used to make lenses. In the conventional schlieren system, [3] a point source is used to illuminate the test section containing the schliere. An image of this light is formed using a converging lens (also called a schlieren lens).

  5. Shock wave - Wikipedia

    en.wikipedia.org/wiki/Shock_wave

    In fact, correct capturing and detection of shock waves are important since shock waves have the following influences: (1) causing loss of total pressure, which may be a concern related to scramjet engine performance, (2) providing lift for wave-rider configuration, as the oblique shock wave at lower surface of the vehicle can produce high ...

  6. Entoptic phenomenon - Wikipedia

    en.wikipedia.org/wiki/Entoptic_phenomenon

    They are shadow images of objects floating in liquid between the retina and the gel inside the eye (vitreous humor). They are visible because they move; if they were pinned to retina by the vitreous or fixed within the vitreous they would be as invisible as ordinary viewing of any stationary object, such as the retinal blood vessels (see ...

  7. Alfvén Mach number - Wikipedia

    en.wikipedia.org/wiki/Alfvén_Mach_number

    It is used in plasma physics, where it is analogous to the Mach number but based on Alfvén waves rather than sound waves. Alfvén and Mach were physicists who studied shock waves. Along with the sonic Mach number, the Alfvén Mach number is frequently used to characterize shock fronts [1] [2] [3] and turbulence [4] [5] in magnetized plasmas.

  8. Optography - Wikipedia

    en.wikipedia.org/wiki/Optography

    Randall Garrett's 1964 fantasy story The Eyes Have It has an image magically developed from the retina of a corpse in a murder investigation. The image is said to be the result of the victim's visual system "backfiring" due to extreme shock, causing the picture in his mind to be returned to the retina.

  9. Undercompressive shock wave - Wikipedia

    en.wikipedia.org/wiki/Undercompressive_shock_wave

    A shock wave is undercompressive if the Lax conditions are not fulfilled. A sharp wave front may remain sharp whilst travelling even when perturbations behind the front travel slower than it. An experiment can be made to show this with travelling liquid steps : a thick film is spread on a thin one.