(A) 300 million meters per second
(B) 300 million meters per hour
(C) 300 million kilometers per second
(D) 300 million kilometers per hour
Q. The speed of light in vacuum is a universal physical constant, commonly denoted by:
(A) s
(B) d
(C) c
(D) l
Q. Sunlight takes about _______ to travel the average distance from the surface of the sun to the Earth.
(A) 5 min 17 sec
(B) 6 min 17 sec
(C) 7 min 17 sec
(D) 8 min 17 sec
Answers:
1. (A) 300 million meters per second
2. (C) c
3. (D) 8 min 17 sec