Write the following statements in a sequential order to find the depth of the ocean bed by the using sonar .
(A) The depth of the ocean bed can be found by d = `(vt)/(2)`.
(B) At the bottom of a ship two devices , one is transmitter which products ultrasonics and a receiver for the detection of the reflected ultrasonics from the ocean bed are fixed .
(C) The velocity fo ultrasonics in ocean water is 'v' and the time taken to receive the reflected ultrasonics from the ocean bed be 'f'.
(D) If the depth of ocean bed is 'd' , then `v = (d + d)/(t) = (2d)/(t)`.

Options

A. ABCD
B. ADCB
C. BADC
D. BDAC

Answer

D

Explanation

(i) Ultrasonic sound is sent to the ocean bed whose depth (d) is to be found from the transmitter attached to the ship (ii) The ultrasonic sound reflected from the ocean bed is received by a suitable detector in the ship (iii) The time taken (t) to receive the sound is measured. (iv) If .v. is the velocity of sound in water, the depth can be found using, `v = (2d)/(t)`