GCSE Physics (AQA)

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Types of Image

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Types of Image

7:08 Types of Image
Spec 4.6.2.5
Previous Calculating Magnification Next Forming Images
  • A real image is formed by a lens where light rays from an object converge on the other side of the lens.
  • Lenses form images by refracting light rays from an object to converge or appear to converge elsewhere.
  • A convex lens curves outwards and causes parallel rays to diverge.
  • In a ray diagram, an object can be represented as an arrow pointing upwards.
  • Rays converge at a point on the other side of the lens, forming a real image.
  • An inverted image is formed when rays from a point on the object converge or appear to converge on the opposite side of the principal axis.
  • The principal axis is the line through the center of the lens along which rays will not refract.
  • An inverted image is upside down compared to the object.
  • Real images can be viewed by holding a screen at the point where light rays converge, used in camera lenses and projectors.
  • A virtual image is formed by a lens where light rays from an object diverge but appear to converge on the same side of the lens.
  • A concave lens curves inwards and causes parallel rays to diverge, forming a virtual image.
  • An upright image is formed when rays from a point on the object converge or appear to converge on the same side of the principal axis.
  • Virtual images can only be viewed by an observer on the other side of the lens, used in telescopes and magnifying glasses.
  • Virtual images trick the brain into thinking light rays converge at the image rather than the object.
  • Real images can be captured on a screen, while virtual images cannot.
  • Understanding the differences between real and virtual images is important for exams.

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