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  2. Prism cover test - Wikipedia

    en.wikipedia.org/wiki/Prism_Cover_Test

    The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]

  3. History of optics - Wikipedia

    en.wikipedia.org/wiki/History_of_optics

    Isaac Newton (1643–1727) investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colours, and that a lens and a second prism could recompose the multicoloured spectrum into white light. He also showed that the coloured light does not change its properties by separating out a coloured ...

  4. Optical spectrometer - Wikipedia

    en.wikipedia.org/wiki/Optical_spectrometer

    The spectrometer uses a prism or a grating to spread the light into a spectrum. This allows astronomers to detect many of the chemical elements by their characteristic spectral lines. These lines are named for the elements which cause them, such as the hydrogen alpha, beta, and gamma lines. A glowing object will show bright spectral lines.

  5. Pokémon Red, Blue, and Yellow - Wikipedia

    en.wikipedia.org/wiki/Pokémon_Red,_Blue,_and_Yellow

    The player's Bulbasaur engaged in battle with a Charmander [2]. Pokémon Red and Blue are played in a third-person view, overhead perspective and consist of three basic screens: an overworld, in which the player navigates the main character; [3] a side-view battle screen; [4] and a menu interface, in which the player may configure their Pokémon, items, or gameplay settings.

  6. Flag of the United States - Wikipedia

    en.wikipedia.org/wiki/Flag_of_the_United_States

    The national flag of the United States, often referred to as the American flag or the U.S. flag, consists of thirteen horizontal stripes, alternating red and white, with a blue rectangle in the canton bearing fifty small, white, five-pointed stars arranged in nine offset horizontal rows, where rows of six stars alternate with rows of five stars.

  7. Google Glass - Wikipedia

    en.wikipedia.org/wiki/Google_Glass

    Google Glass can be controlled using the touchpad built into the side of the device. Touchpad: A touchpad, similar to that of one on a laptop, is located on the side of Google Glass, allowing users to control the device by swiping through a timeline-like interface displayed on the screen. [34]

  8. Sodium vapor process - Wikipedia

    en.wikipedia.org/wiki/Sodium_vapor_process

    In this way the yellow color does not register on the red, green, or blue layers. [5] This allows the complete range of colors to be used, not only in costumes, but also in makeup and props. A camera with a beam-splitter prism is used to expose two separate film elements. The main element is the regular color negative film insensitive to sodium ...

  9. Dichroic prism - Wikipedia

    en.wikipedia.org/wiki/Dichroic_prism

    The red beam is also totally internally reflected due to a small air-gap between prisms A and B. The remaining green component of the beam travels through prism C. The trichroic prism assembly can be used in reverse to combine red, green and blue beams into a coloured image, and is used in this way in some projector devices.