Convert Rydberg constant to calorie (th)
Please provide values below to convert Rydberg constant [Ry] to calorie (th) [cal (th)], or Convert calorie (th) to Rydberg constant.
How to Convert Rydberg Constant to Calorie (Th)
1 Ry = 5.21002413957935e-19 cal (th)
Example: convert 15 Ry to cal (th):
15 Ry = 15 × 5.21002413957935e-19 cal (th) = 7.81503620936902e-18 cal (th)
Rydberg Constant to Calorie (Th) Conversion Table
| Rydberg constant | calorie (th) |
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Rydberg Constant
The Rydberg constant (Ry) is a physical constant that represents the highest wavenumber (inverse wavelength) of any photon in the hydrogen atom's emission spectrum, used to calculate spectral lines.
History/Origin
Named after the Swedish physicist Johannes Rydberg, the Rydberg constant was introduced in the late 19th century as part of Rydberg's formula to describe the spectral lines of hydrogen, significantly advancing atomic physics.
Current Use
The Rydberg constant is used in quantum physics and spectroscopy to determine energy levels of hydrogen and other hydrogen-like atoms, and in calculations involving atomic spectra and quantum mechanics.
Calorie (Th)
The calorie (th) is a unit of energy used to quantify the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius.
History/Origin
The calorie (th) was historically used in the context of thermochemistry and nutrition, originating from the calorie concept in the 19th century. It has largely been replaced by the joule in scientific contexts but remains in common use in some regions and fields.
Current Use
Today, the calorie (th) is primarily used in nutrition labeling and food energy measurements, especially in regions where the thermochemical calorie is still recognized, although the joule is the SI standard.