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-7. **Albert Einstein (1905)**  <br>  
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+### 7. **Albert Einstein (1905)**  <br> ──────────────  
 
    * **Explanation of the Photoelectric Effect**: Introduced the concept of photons, explaining that light consists of discrete energy packets. ([byjus.com](https://byjus.com/physics/einsteins-explaination/?utm_source=chatgpt.com))