Planck Constant Over Two Pi ℏ
Symbol Meaning
“Planck Constant Over Two Pi” is used in wave quantum mechanics as a coefficient that relates the basic characteristics of particles, such as vector, momentum, frequency, energy, phase, and action. This separate quantity called the “Dirac constant” is equal to the “Planck Constant” divided by 2 𝜋.
To denote this quantity, Unicode has a special symbol. It looks like an italicized Latin letter “h”. Use the symbol “Planck Constant Over Two Pi” in your scientific works, formulas, and calculations. You can find even more special symbols in the blocks Letterlike Symbols2100–214F and Mathematical Operators2200–22FF .
The symbol “Planck Constant Over Two Pi” is included in the “Letterlike symbols” subblock of the “Letterlike Symbols” block and was approved as part of Unicode version 1.1 in 1993.
| Unicode Name | Planck Constant Over Two Pi |
| Unicode Number | |
| HTML Code | |
| CSS Code | |
| Entity | ℏ |
| Plane | 0: Basic Multilingual Plane |
| Unicode Block | Letterlike Symbols |
| Unicode Subblock | Letterlike symbols |
| Unicode Version | 1.1 (1993) |
| Type of paired mirror bracket (bidi) | None |
| Composition Exclusion | No |
| Case change | 210F |
| Simple case change | 210F |
| Math | + |
| Alphabetic | + |
| Lowercase | + |
| Cased | + |
| ID_Start | + |
| ID_Continue | + |
| XID_Start | + |
| XID_Continue | + |
| Grapheme_Base | + |
| scripts | Common |
| Other_Math | + |
| Encoding | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | E2 84 8F | 226 132 143 | 14845071 | 11100010 10000100 10001111 |
| UTF-16BE | 21 0F | 33 15 | 8463 | 00100001 00001111 |
| UTF-16LE | 0F 21 | 15 33 | 3873 | 00001111 00100001 |
| UTF-32BE | 00 00 21 0F | 0 0 33 15 | 8463 | 00000000 00000000 00100001 00001111 |
| UTF-32LE | 0F 21 00 00 | 15 33 0 0 | 253820928 | 00001111 00100001 00000000 00000000 |