Enter the wavelength into the calculator to determine the wavenumber. This calculator can also evaluate any of the variables given the others are known.
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Cm To Wavenumber Formula
The following formula is used to calculate the wavenumber.
W = 1 / ฮป
Variables:
- W is the wavenumber (cm-1)
- ฮป is the wavelength in centimeters (cm)
To calculate the wavenumber, take the reciprocal of the wavelength in centimeters. This means dividing 1 by the wavelength. The result is the wavenumber, measured in reciprocal centimeters (cm-1).
| Wavelength (cm) | Wavelength (ฮผm) | Wavelength (nm) | Wavenumber (cm-1) |
|---|---|---|---|
| 0.00106 | 10.6 | 10600 | 943.40 |
| 0.000300 | 3.0 | 3000 | 3333.33 |
| 0.000250 | 2.5 | 2500 | 4000.00 |
| 0.000155 | 1.55 | 1550 | 6451.61 |
| 0.0001064 | 1.064 | 1064 | 9398.50 |
| 0.0000785 | 0.785 | 785 | 12738.85 |
| 0.0000633 | 0.633 | 633 | 15797.79 |
| 0.0000532 | 0.532 | 532 | 18796.99 |
| 0.0000488 | 0.488 | 488 | 20491.80 |
| 0.0000405 | 0.405 | 405 | 24691.36 |
| 0.0000355 | 0.355 | 355 | 28169.01 |
| 0.0000340 | 0.340 | 340 | 29411.76 |
| 0.0000325 | 0.325 | 325 | 30769.23 |
| 0.0000313 | 0.313 | 313 | 31948.88 |
| 0.0000302 | 0.302 | 302 | 33112.58 |
| 0.0000266 | 0.266 | 266 | 37593.98 |
| 0.0000248 | 0.248 | 248 | 40322.58 |
| 0.0000214 | 0.214 | 214 | 46728.97 |
| 0.0000200 | 0.200 | 200 | 50000.00 |
| 0.0000193 | 0.193 | 193 | 51813.47 |
| Formulae: k(cm-1) = 1 / ฮป(cm) = 104 / ฮป(ฮผm) = 107 / ฮป(nm). | |||
What is Cm To Wavenumber?
Cm to wavenumber is a conversion used in spectroscopy, which is the study of the interaction between matter and electromagnetic radiation. The wavenumber, often used in infrared spectroscopy, is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance. It is typically measured in reciprocal centimeters (cm-1), hence the conversion from cm to wavenumber. The wavenumber is calculated as the reciprocal of the wavelength in centimeters (1/wavelength).
How to Calculate Cm To Wavenumber?
The following steps outline how to calculate the Cm To Wavenumber using the formula: W = 1 / ฮป
- First, determine the wavelength in centimeters (ฮป).
- Next, use the formula W = 1 / ฮป to calculate the wavenumber (W).
- Finally, calculate the Cm To Wavenumber.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
wavelength in centimeters (ฮป) = 5
