Physics Question Which is true of a cheerleader\'s megaphone? It is wide at the
ID: 1654908 • Letter: P
Question
Physics Question
Which is true of a cheerleader's megaphone? It is wide at the far end in order to increase the diffraction so that the sound waves are confined to the forward diffraction. It is wide at the far end in order to decrease the diffraction so that the sound waves are confined to the forward diffraction. It is wide at the far end in order to increase the diffraction so that the sound waves are spread left and right. It is wide at the far end in order to decrease the diffraction so that the sound waves are spread left and right.Explanation / Answer
Answer: B
A microphone works on two facts.
1. It directs sounds waves towards the observer
2. It reduces the spreading of sound waves in unwanted directions. This can be achieved by the come shape which decreases diffraction at the far end.