2019-04-08T17:42:53+03:00[Europe/Moscow] en true angle of incidence, angle of reflection, angle of refraction, colour blind, cornea, critical angle, disperses, image, light, light sources, non-luminous, normal, opaque, optical fibres, primary colours, rainbow, reflects, refraction, secondary colours, spectrum, total internal reflection, translucent flashcards
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  • angle of incidence
    the angle between the incident ray and the normal line
  • angle of reflection
    the angle between the reflected ray and the normal line
  • angle of refraction
    the angle between the refracted ray and the normal line
  • colour blind
    a genetic disease affecting colour vision and results from a malfunction of certain cone cells in the retina of the eye
  • cornea
    the transparent layer at the front of the eye
  • critical angle
    the smallest angle of incidence at which total internal reflection occurs
  • disperses
    the splitting up of a ray of light of mixed wavelengths by refraction into its components
  • image
    the point from which rays of light entering the eye appear to have originated
  • light
    a form of energy emitted by luminous objects like the sun
  • light sources
    (luminous objects) are objects that emit visible light
  • non-luminous
    objects which produce no light
  • normal
    an imaginary line at right angles to a surface where a light ray strikes it
  • opaque
    objects which absorb, scatter or reflect light and do not allow any light to pass through
  • optical fibres
    uses total internal reflection to transmit light along very fine tubes of plastic or glass
  • primary colours
    with respect to light are any of red, blue or green
  • rainbow
    an optical phenomenon that appears as the colours of the spectrum when falling water droplets are illuminated by sunlight
  • reflects
    the return of all, or part of, a beam of particles or waves
  • refraction
    the change in direction of a light ray as a result of its change in velocity
  • secondary colours
    are colours that can be obtained by mixing two primary colours
  • spectrum
    a band of colours produced by separation of the colours in white light
  • total internal reflection
    the complete reflection of light at a boundary between two media
  • translucent
    objects that transmit light but diffuse (scatter) the light as it passes through