Who was the first scientist to successfully measure the speed of light using observations of Jupiter's moon Io?
Correct answer: C. Ole Rømer
- A. Galileo Galilei
- B. Isaac Newton
- C. Ole Rømer
- D. Albert Einstein
Explanation
Ole Rømer estimated the speed of light in 1676 by observing delays in the eclipses of Jupiter's moon Io as Earth moved in its orbit. Galileo studied the possibility earlier but could not measure light's speed successfully.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Inventions and Discoveries
Inventions and Discoveries covers the people, dates, principles and practical uses behind developments such as the wheel, printing press, telephone, electricity, radio, computer, internet, vaccines and space technology. It distinguishes an invention, which creates a device or process, from a discovery, which identifies something already present in nature.
Practise Inventions and Discoveries
286 free Inventions and Discoveries MCQs from General Knowledge, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask General Knowledge questions like this
General Knowledge is on 106 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Inventions and Discoveries questions
Cryptography is study of _______________?
Telepathy is the study of ____________?
Pisciculture is the study of ______________?
What country used a tank first?
Which is the Parent Company of TikTok?
World's first YouTube video was uploaded by its Co-founder 'Jawed Karem' in April 23, 2005 ,with the name: ___________?