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

Which of the following pair is INCORRECT for some transparent media with respect toair? (may consider the most approximate value)

Find the value of 'X' and 'h' in the following diagram.

A coin of diameter 10 cm is placed at a distance 3.5 f from the pole of a concave mirror of focal length f. The linear magnification and the diameter of the image are:

Which of the following pair is INCORRECT for some transparent media with respect toair? (may consider the most approximate value)