P18_015 - L = 19 . 5 18 . 3 = 1 . 2 m. (b) Now we set L/ =...

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15. (a) Building on the theory developed in § 18 4, we set ∆ L/λ = 1 2 (odd numbers) in order to have destructive interference. Since v = , we can write this in terms of frequency: f = (odd number) v 2∆ L = 143 Hz for n =1 429 Hz for n =3 715 Hz for n =5 where we have used v = 343 m/s (note the remarks made in the textbook at the beginning of the exercises and problems section) and ∆
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Unformatted text preview: L = 19 . 5 18 . 3 = 1 . 2 m. (b) Now we set L/ = 1 2 (even numbers) which can be written more simply as (all integers) in order to establish constructive interference. Thus, f = (integer) v L = 286 Hz for n = 1 572 Hz for n = 2 858 Hz for n = 3 ....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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