Planck-Einstein Relation

📊 intermediate

$$E = hf$$

Relates the energy of a photon to its frequency.

Variables & Units

$E$

Energy of photon

Unit: Joule ($J$)

$h$

Planck's constant

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

$f$

Frequency

Unit: Hertz ($Hz$)

Key Information

📐 Derived From

Planck's blackbody radiation law.

💡 Example

Finding the energy of a blue light photon.

🔧 Applications

Photoelectric effect and spectroscopy.

⚠️ Constraints

Applicable to electromagnetic radiation.

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