Question

Using what you have learned about waves, describe an experiment you could design to measure distances to objects that cannot be reached directly.

Answer 1

lets talk about sound waves. suppose you see a mountain at far distance separated by a huge river. you want to know the distance of that mountain. but physical meausrement is not possible. here yu canshout vey loud , after some time, you will hear your echo. you need to measure the time gap between your shout and the echo your heard.

we know , sound waves travels with a constant speed approx 340 m/s. suppose your measure the time gap to be 3.6 second, in this time sound travels a total distance of 340*3.6=1224 m.

Now you notice this distance is Two times the distance between you and the mountain. so now , you can say distance betwwen you and the mountain is half the distance travelled by the sound. and it is 1224/2=612 m.

Thank you.