Please note: In order to keep Hive up to date and provide users with the best features, we are no longer able to fully support Internet Explorer. The site is still available to you, however some sections of the site may appear broken. We would encourage you to move to a more modern browser like Firefox, Edge or Chrome in order to experience the site fully.

Finding the Speed of Light : The 1676 Discovery that Dazzled the World, Hardback Book

Finding the Speed of Light : The 1676 Discovery that Dazzled the World Hardback

Illustrated by Rebecca Evans

Part of the The History Makers Series series



More than two centuries before Einstein, using a crude telescope and a mechanical timepiece, Danish astronomer Ole Romer measured the speed of light with astounding accuracy.

How was he able to do this when most scientists didn't even believe that light traveled?

Like many paradigm-shattering discoveries, Romer's was accidental.

Night after night he was timing the disappearance and reappearance of Jupiter's moon Io behind the huge, distant planet.

Eventually he realized that the discrepancies in his measurements could have only one explanation: Light had a speed, and it took longer to reach Earth when Earth was farther from Jupiter.

All he needed then to calculate light's speed was some fancy geometry.




Free Home Delivery

on all orders

Pick up orders

from local bookshops


Also in the The History Makers Series series