​The magnification of an image is +1.5 and the object distance is 30 cm from a spherical mirror. The image is formed at ______________.

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:

The appearance of a stick at the interface when immersed in water is an example of___________.