1. What\'s the wavelength of sound waves having a frequency of 256.0 sec -1 at 2
ID: 1660638 • Letter: 1
Question
1. What's the wavelength of sound waves having a frequency of 256.0 sec-1 at 20°C? Speed of sound = 340.0 m/sec. (The problem is about sound, but this doesn't change the basic idea of the equation "wavelength x frequency = speed".)
2. A photon has a frequency of 6.0 x 104 Hz. Convert this frequency into wavelength (nm). Does this frequency fall in the visible region?
3. The wavelength of an argon laser's output is 488.0 nm. Calculate the frequency of this wavelength of electromagnetic radiation.
4. Calculate the frequency of electromagnetic radiation that has a wavelength of 1.315 micrometers.
Explanation / Answer
1) wavelength =speed / frequency
= 340/256 = 1.33 m
2) wavlength = c/f = 3*10^8 / 6*10^4 = 5000 m
No this does not fall in the visible range
3) f = c/lamda = 3*10^8 / (488*10^-9) = 6.15*10^14 Hz
4) frequency = 3*10^8 / (1.315*10^-6) = 2.28*10^14 Hz
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