A stretched string has a fundamental frequency of 165 Hz. Someone nearby sings a note at a frequency of 495 Hz. As a result, the string: 1. Will begin to vibrate 2. Will not vibrate at all 3. Might vibrate…depends on the song ra te … ot M ig h tv ib ill n W n. . ra te vi b to in eg ill b W 0 of 250 de pe at vi br at e al l 33% 33% 33% 30 The sources A and B are identical, emitting waves with wavelngth . Waves from each source travel along the path shown. What distance smallest X is necessary for the waves to be completely out of phase at the Line shown? A D B X X 1. 2. 3. 4. 5. X= D X= D/2 X= /4 X= X= /2 0 of 250 30 The two sources A and B are identical, emitting waves of wavelength . They are separated by a distance D=1.5, equally spaced from the origin along the y-axis. What type of interference occurs at point P1? Fully destructive Mostly destructive Fully constructive Depends on the distance of P1 from the origin A D P1 B 25% 25% 25% 25% ... tiv e ti v e 0 of 250 ti ve 1. 2. 3. 4. P2 30 The two sources A and B are identical, emitting waves of wavelength . They are separated by a distance D=1.5, equally spaced from the origin along the y-axis. What type of interference occurs at point P2? 1. 2. 3. 4. Fully destructive Mostly destructive Fully constructive Depends on the distance of P2 from the origin P2 A D P1 B 25%25%25%25% 0 of 250 30 Are there any other points besides P1 where the interference is fully constructive, and if so, how many such points (including P1) are there? No other points There are 2 total There are 4 total There are 6 total 25%25%25%25% A D P1 B 0 of 250 .. .. .. 30 ts 1. 2. 3. 4. P2