Question

A ray of light passing through the optical centre of a thin lens:

Options

• Converges at the principal focus

• Passes without appreciable deviation

• Emerges parallel to the principal axis

• Bends away from the principal axis by a large angle

Answer 1

A ray passing through the optical centre of a thin lens passes without appreciable deviation. This is one of the standard rules used for drawing ray diagrams to locate the image formed by a lens.