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jan 1, 1693 - Edmond Halley

Description:

(1693) Edmond Halley provides a mathematical equation for finding the focal lengths of lenses of all shapes.

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwiGnNPWz4TfAhUOA6wKHQQ7CqYQjRx6BAgBEAU&url=https%3A%2F%2Fwww.britannica.com%2Fbiography%2FEdmond-Halley&psig=AOvVaw0Y_oeJM6VgLstGI_AjkBoh&ust=1543959550759320

Added to timeline:

Date:

jan 1, 1693
Now
~ 333 years ago