258 B
258 B
quantum mechanics
denoted as h, equal to 6.62607015 × 10⁻³⁴ joule-seconds (J·s)
reduced plancks constant is \hbar, which is equal to \frac{h}{2\pi}\approx 1.054571817 \times 10^{-34}
used to relate a photons frequency to energy via E=hf