33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
2069571
172395
2
Create a timeline
Public Timelines
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
FAQ Get premium
Create a timeline
Public timelines
FAQ
About & FeedbackTermsPrivacyFAQ
Support 24/7  
CabinetGet premium
Donate

jan 1, 1920 - Albert A. Michelson's Measurements

Description:

Michelson placed two mirrors on top of two mountains (in California) and measured the distance between the two mirrors (35.4 km). He sent a light beam from one mirror to the other. Using accurate timing devices, he carefully calculated the speed of light in the Earth's atmosphere which is 299 798 km/s.

Added to timeline:

Gr. 8 Science Unit C Section 1.0 Timeline

ByApril Santos
5 Nov 2018
0
0
425

Date:

jan 1, 1920
Now
~ 105 years ago
About & FeedbackTermsPrivacyFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL