The receiver received the signal from the emitter reflected from the seabed in 2 s.

The receiver received the signal from the emitter reflected from the seabed in 2 s. What is the depth of the sea if the speed of the signal is 1500m / s?

Given:

t = 2 seconds – the time interval after which the receiver received the reflected signal from the seabed;

u = 1500 meters / second – signal propagation speed.

It is required to determine L (meter) – the depth of the sea.

For a time interval t, the signal from the emitter reaches the sea day, and then, reflected from it, returns to the receiver. That is, the total signal travels a distance equal to 2 * L. Then, to determine the depth of the sea, you must use the following formula:

t = 2 * L / u, from here we find that:

L = u * t / 2 = 1500 * 2/2 = 1500 meters (1.5 kilometers).

Answer: the depth of the sea is 1.5 kilometers.