Convert **petahertz** to **decahertz**

Selected category: frequency and angular frequency.

Petahertz (PHz) is a unit of frequency equal to 10^{15} Hz. For example 2.47 PHz is the frequency of Lyman-alpha line, a spectral line of hydrogen, which is emitted when the electron falls from the n = 2 orbital to the n = 1 orbital.

Decahertz (daHz) is a unit of frequency equal to 10 hertz. About 1.2 daHz is the lowest frequency that a human can hear.

Swap, do a decahertz to petahertz conversion.