Question

What is speed of light in vacuum? Who first measured the speed of light?

Answer 1

HELLO!!!
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➡️The speed of light in Vaccum is 3.0×10^8(approx)[186,282 miles per second]
➡️ The first who measured the speed of light was OLAUS ROEMER.
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HOPE IT HELPS U✌✌

Answer 2

Dear Student,

◆ Answers -

• Speed of light in vacuum is 3×10^8 m/s.
• Speed of light was first measured by Olaus Roemer.

● Extra information -

• As light is electromagnetic wave it can travel in vacuum also.
• Speed of light in vacuum is constant and 3×10^8 m/s.
• Speed of light was first measured by astronomer Olaus Roemer by observing eclipses of Jupiter's moons.

Thanks dear. Hope this helps you...