Convert Rydberg constant to calorie (IT)
Please provide values below to convert Rydberg constant [Ry] to calorie (IT) [cal (IT)], or Convert calorie (IT) to Rydberg constant.
How to Convert Rydberg Constant to Calorie (It)
1 Ry = 5.20653983949556e-19 cal (IT)
Example: convert 15 Ry to cal (IT):
15 Ry = 15 × 5.20653983949556e-19 cal (IT) = 7.80980975924334e-18 cal (IT)
Rydberg Constant to Calorie (It) Conversion Table
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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 (It)
The calorie (cal) is a unit of energy traditionally used to quantify the amount of heat required to raise the temperature of one gram of water by one degree Celsius at standard atmospheric pressure.
History/Origin
The calorie was originally defined in the 19th century as a unit of heat energy in thermodynamics. It has historically been used in nutrition and physics, but has largely been replaced by the joule in scientific contexts. The 'small calorie' (cal) is distinct from the 'large calorie' (kcal), which is commonly used in food energy labeling.
Current Use
Today, the calorie is primarily used in nutrition to measure the energy content of foods and beverages, although the SI unit of energy, the joule, is increasingly preferred in scientific and technical fields.