Question

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle θ, the spot of the light is found to move through a distance y on the scale. The angle θ is given by

• A. \(\frac {y}{2x}\)
• B. \(\frac {y}{x}\)
• C. \(\frac {x}{2y}\)
• D. \(\frac {x}{y}\)

Answer 1

The Correct Option is A

The correct option is (A): \(\frac {y}{2x}\).