Bohr's Frequency Condition

📊 intermediate

$$\Delta E = hf = E_2 - E_1$$

Relates the frequency of light emitted or absorbed to the change in energy levels of an electron in an atom.

Variables & Units

$\Delta E$

Energy difference between levels

Unit: Joule ($J$) or $eV$

$h$

Planck constant

Unit: $6.626 \times 10^{-34} J \cdot s$

$f$

Frequency of emitted/absorbed photon

Unit: Hertz ($Hz$)

Key Information

📐 Derived From

Bohr's model of the atom.

💡 Example

Calculating the frequency of the first line in the Lyman series.

🔧 Applications

Spectroscopy and lasers.

⚠️ Constraints

Strictly applies to hydrogen-like atoms.

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