GCSE Physics (AQA)

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Types of Lens

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Waves Electromagnetic waves

Types of Lens

5:38 Lenses and Ray Diagrams
Spec 4.6.2.5
Previous EM Waves & Atoms Next Diverging Ray Diagrams
  • Lenses form images by refracting light.
  • Refraction is the change in direction of waves when moving from one medium to another, like air to glass.
  • Lenses can create images that appear different from the object.
  • Magnifying glasses use lenses to enlarge images for detailed viewing.
  • Microscopes use lenses for similar purposes.
  • Binoculars and telescopes use lenses to make distant objects appear closer.
  • Cameras and eyes use lenses to produce images for interpretation.
  • Glasses use lenses to adjust light refraction for clearer images.
  • Two main types of lenses: convex and concave.
  • Convex lenses cause light rays to converge.
  • Convex lenses are symmetrical with circular curvature.
  • Light slows down and bends towards the normal when entering a convex lens, then bends away when exiting.
  • Convex lenses form images by converging parallel rays at a point.
  • Concave lenses cause light rays to diverge.
  • Concave lenses are symmetrical with inward curvature, forming a cave-like shape.
  • Light bends towards the normal when entering a concave lens and away when exiting.
  • Concave lenses do not converge rays; they diverge them.
  • Images with concave lenses are formed by tracing paths back to a point on the initial side of the lens.
  • Convex lenses make rays converge; concave lenses make them diverge.

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