Convert nm to cm-1
Use our Wavelength to Wavenumber Calculator to easily convert wavelengths in nanometers (nm) to wavenumbers in reciprocal centimeters (cm⁻¹). Quick, accurate, and user-friendly!
How to Convert Wavelength to Wavenumber
To convert wavelength to wavenumber, you can use the following formula:
Wavenumber (cm⁻¹) = 1 / Wavelength (cm)
Example:
If the wavelength is 500 nanometers (nm), which is equal to 0.00005 meters (cm), the wavenumber would be:
Wavenumber = 1 / 0.00005 cm = 20,000 cm⁻¹
Therefore, a wavelength of 500 nm corresponds to a wavenumber of 20,000 cm⁻¹.
Wavelength to Wavenumber Formula
Wavenumber (cm⁻¹) = 1 / Wavelength (cm)
This formula highlights the inverse relationship between wavelength and wavenumber. A shorter wavelength corresponds to a higher wavenumber and vice versa.
Wavelength to Wavenumber Chart
For quick reference, here’s a basic chart showing the conversion of common wavelength (nm) values to wavenumber (cm⁻¹):
| 400 nm to cm⁻¹ = 25,000 |
| 500 nm to cm⁻¹ = 20,000 |
| 350 nm to cm⁻¹ = 28,571 |
| 600 nm to cm⁻¹ = 16,667 |
| 1 nm to cm⁻¹ = 10,000,000 |
| 800 nm to cm⁻¹ = 12,500 |
| 2500 nm to cm⁻¹ = 4,000 |
| 632 nm to cm⁻¹ = 15,823 |
| 700 nm to cm⁻¹ = 14,286 |
| 450 nm to cm⁻¹ = 22,222 |
| 750 nm to cm⁻¹ = 13,333 |
| 1200 nm to cm⁻¹ = 8,333 |
| 300 nm to cm⁻¹ = 33,333 |
| 950 nm to cm⁻¹ = 10,526 |
| 1500 nm to cm⁻¹ = 6,667 |
| 2100 nm to cm⁻¹ = 4,762 |
| 375 nm to cm⁻¹ = 26,667 |
| 480 nm to cm⁻¹ = 20,833 |
| 820 nm to cm⁻¹ = 12,195 |
| 570 nm to cm⁻¹ = 17,544 |
| 920 nm to cm⁻¹ = 10,870 |
| 660 nm to cm⁻¹ = 15,152 |
| 340 nm to cm⁻¹ = 29,412 |
| 890 nm to cm⁻¹ = 11,236 |
| 2900 nm to cm⁻¹ = 3,448 |
| 1800 nm to cm⁻¹ = 5,556 |
| 770 nm to cm⁻¹ = 12,987 |
| 250 nm to cm⁻¹ = 40,000 |
| 990 nm to cm⁻¹ = 10,101 |
| 410 nm to cm⁻¹ = 24,390 |
| 620 nm to cm⁻¹ = 16,129 |
Frequently Asked Questions (FAQs)
1. What is the unit of wavelength?
Wavelength is often measured in nanometers (nm) for convenience in various fields, especially optics and spectroscopy.
2. What is the unit of wavenumber?
Wavenumber is typically expressed in reciprocal centimeters (cm⁻¹).
3. Why is wavenumber used in spectroscopy?
Wavenumber is a convenient unit for spectroscopy as it directly relates to the energy of the radiation.
4. What is 785nm to cm-1?
785 nm ≈ 12,738 cm⁻¹.
5. What is 400 nm to cm -1?
400 nm = 25,000 cm⁻¹.
5. How Do You Convert 400nm to Wavenumber?
To convert 400 nm to wavenumber:
400 nm = 400 × 10⁻⁷ cm = 4 × 10⁻⁵ cm.
Use the formula:
Wavenumber (cm⁻¹) = 1 / Wavelength (cm).
Wavenumber = 1 / (4 × 10⁻⁵) = 25,000 cm⁻¹.
Thus, the wavenumber for a wavelength of 400 nm is 25,000 cm⁻¹.
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