Doppler Effect Problem

  • #1
astronomystudent
96
0
1.) Suppose the sound from an approaching train whistle normally has a frequency of 1200 cycles per second, but the train is approaching at 50 meters per second. How would the Doppler Effect change the wavelength of the sound? (speed of sound 335 meters per second; I would like a quantitative answer here for full credit)

So far I have done the following: c = wavelength (frequency)
335 = wavelength (1200)
335/1200 = wavelength
wavelength = .279
wavelength = 2.79 x 10^-1 meters

c = wavelength (frequency)
335 = wavelength (1200 + 50)
335/1250 = wavelength
wavelength = .268
wavelength = 2.7 x 10^-1 meters

These are the forumlas I have from class, but I don't know any other way to solve the problem or if it is right.
 

Answers and Replies

Suggested for: Doppler Effect Problem

  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
0
Views
3K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
0
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
1
Views
520
  • Last Post
Replies
1
Views
7K
  • Last Post
Replies
2
Views
21K
Top