Indicate true or false in each of the following statements: 1) The beating of tw
ID: 1406114 • Letter: I
Question
Indicate true or false in each of the following statements:
1) The beating of two waves can be heard as a much higher frequency than the sum of the two frequencies.
2) The beating of two sound waves can be heard as the variation in amplitude of their sum at a frequency equal to their difference in frequency
3) The fourth harmonic is four times the frequency of the fundamental.
4) A standing wave is formed by two identical waves traveling in the same direction
5) Destructive interference occurs when the phase difference of two otherwise identical waves is 2 or multiples thereof
Explanation / Answer
The beat frequency is equal to the absolute value of the difference in frequency of the two waves
1) The beating of two waves can be heard as a much higher frequency than the sum of the two frequencies - False
2) The beating of two sound waves can be heard as the variation in amplitude of their sum at a frequency equal to their difference in frequency - False
3) The fourth harmonic is four times the frequency of the fundamental. - true
Frequency of nth harmonic is n times the fundamental
4)A standing wave is formed by two identical waves traveling in the same direction - Flase
When two wavesw move in opposite direction and superimpose then standing waves are formed
5) Destructive interference occurs when the phase difference of two otherwise identical waves is 2 or multiples thereof - Flase
Destructive interference occurs when the phase difference of two otherwise identical waves is or multiples thereof , the given case is for constuctive interferece.