Home
What is the speed of light in vacuum?

Question 1:

What is the speed of light in vacuum?

A. 500 000 km/s

B. 300 000 km/s

C. 200 000 km/s

D. 400 000 km/s

These questions are from this test. Would you like to take a practice test?

Trivial Practice Quiz science-technology - Test 123 | Englishfreetest.com

30 minutes
15 questions