Question

If an object in air is viewed from beneath the surface of water below, where does the object appear to be?

• A. The object appears above its true position.
• B. The object appears exactly at its true position.
• C. The object appears below its true position.
• D. The object cannot be viewed from beneath the water's surface.

Answer 1

The correct option is A The object appears above its true position.

When we see an object in air from underwater, objects appears above its true position because of refraction. In underwater refraction is the bending or curving of a sound ray which results when the ray passes through a sound speed from a region of one sound speed to a region of a different speed. The amount of ray bending is dependent on the amount of difference between sound speeds, that is, the variation in temperature and pressure of the water.This is known as acoustics effect.