Michelson-Morley experiment

noun
Mi·​chel·​son-Mor·​ley experiment | \¦mīkəlsən¦mȯrlē-\

Definition of Michelson-Morley experiment 

: an experiment that shows that the two parts of a divided ray of light travel at the same speed over paths perpendicular to each other (as over east-west and north-south paths) and that leads to the deductions that the motion of the earth through space has no effect upon the velocity of light and the absolute motion of the earth is not measurable

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Michelson-Morley experiment

after Albert A. Michelson †1931 American physicist and Edward W. Morley †1923 American chemist and physicist

Keep scrolling for more

Learn More about Michelson-Morley experiment

Share Michelson-Morley experiment

Resources for Michelson-Morley experiment

Dictionary Entries near Michelson-Morley experiment

Michelet

michelia

Michelson

Michelson-Morley experiment

Michener

micher

Michigan

Statistics for Michelson-Morley experiment

Look-up Popularity

Comments on Michelson-Morley experiment

What made you want to look up Michelson-Morley experiment? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

living or existing for a long time

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!