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+1. **Max Planck (1900)**  
+   * Founder of quantum theory by introducing the concept of energy quantization.
+
+   Formula for quantized energy:  
+   $\huge \color{DeepSkyBlue} E = h \cdot f$
+
+   Where:  
+   - $\large \color{DeepSkyBlue} E$ is the energy of the photon.  
+   - $\large \color{DeepSkyBlue} h$ is Planck's constant ($6.626 \times 10^{-34} \, \text{J·s}$).  
+   - $\large \color{DeepSkyBlue} f$ is the radiation frequency.