What is a lens?

  • A
    $A$ piece of glass
  • B
    An optical system with two refracting surfaces
  • C
    $A$ mirror with a curved surface
  • D
    $A$ device to reflect light

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Similar Questions

$A$ light ray incident normally on a plane mirror suffers a deviation of

$A$ plane mirror is placed vertically facing due north. An arrow pointing north-east is kept in front of the mirror. In which direction will the arrow point in this image?

From which point of a lens are all the distances measured?

Write down four important characteristics of the image formed by a plane mirror.

Give one use of a concave lens.

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