Question 4

Light travels 1 millimetre in 3.3 picoseconds.

Question a to c - multiple choice question

a	How long does it take for light to travel 1 metre?
	330 picoseconds	3.3 nanoseconds	33 nanoseconds
b	How long does it take for light to travel 1 kilometre?
	3.3 nanoseconds	33 nanoseconds	3.3 microseconds
c	How far does light travel in 1 nanosecond?
	3.03 mm	30.3 mm	303 mm