What are its wavelength and frequency?

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SUMMARY

The discussion focuses on calculating the wavelength and frequency of a wave traveling at a speed of 200 m/s with a wave number of 1.5 rad/m. The correct wavelength is determined to be approximately 0.66 m, derived from the formula where distance equals wavelength multiplied by the number of wavelengths. The frequency is calculated using the relationship v = λf, resulting in a frequency of 300 Hz. However, the initial calculations were questioned, indicating a need for clarification on the relationship between wave parameters.

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lostie100
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A wave travels with speed 200m/s. Its wave number is 1.5rad/m. What are its wavelength and frequency?

distance = wavelength x # of wavelengths
v=lamda(f)

1m = 1.5 (lamda) since in 1 meter there was 1.5 waves. 1/1.5 = 0.66m

200 = 0.66 (f); f = 300Hz.

But this is wrong. I don't know why...
 
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lostie100 said:
A wave travels with speed 200m/s. Its wave number is 1.5rad/m. What are its wavelength and frequency?

distance = wavelength x # of wavelengths
v=lamda(f)

1m = 1.5 (lamda) since in 1 meter there was 1.5 waves. 1/1.5 = 0.66m

200 = 0.66 (f); f = 300Hz.

But this is wrong. I don't know why...
How many radians are there in a single cycle (wavelength)?
 

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