light

Cards (22)

  • what is the angle between the incoming wave and the normal?
    angle of incidence
  • what is the angle between the reflected wave and the normal?
    angle of reflection
  • what is specular reflection?
    when waves are reflected in a single direction by a smooth surface
  • what is diffuse reflection?
    when waves are reflected by a rough surface, and the waves are reflected in all directions
  • what is total internal reflection?
    the wave is reflected back into the material
  • when does a wave experience total internal reflection?
    when the wave travels through a dense material towards a less dense substance
  • what happens when light is reflected by something rough?
    the surface looks matt, and you don't get a clear reflection
  • which colour has the longest wavelength?
    red
  • which colour has the highest frequency?
    violet
  • which colour reflects all of the wavelengths of visible light equally?
    white
  • which colour absorbs all wavelengths of visible light?
    black
  • what is the shape of a converging lens?
    bulges outwards in the middle
  • what is the shape of a diverging lens?
    caves inwards
  • what is the principal focus of a converging lens?
    where rays hitting the lens parallel to the axis all meet
  • what is the principal focus of a diverging lens?
    where rays hitting the lens parallel to the axis appear
  • what is the focal length?
    the distance from the centre of the lens to the principle focus
  • what is another name for a converging lens?
    convex lens
  • what is another name for a diverging lens?
    concave lens
  • when is a real image formed?
    when the light rays actually come together to form the image
  • when is a virtual image formed?
    when the light rays from the object appear to be coming from a completely different place to where they are actually coming from. The light rays don't actually come together
  • what is an example of a real image?
    image formed on the eye's retina
  • what is an example of a virtual image?
    image created by a magnifying glass