Recent content by onecupoftea

A-HA! Thank you! I now get the answer 2×107. Yeah, I did look at the 2000s and think that was a tad wrong... I'm now torn between being pleased that I knew how to work out the answer and the dismay of not being able to use a calculator. Thank you again!

Homework Statement A source of light emits a train of waves lasting 0.04 μs. The light has a wavelength of 600nm and the speed of light is 3×108ms-1. How many complete waves are sent out? a)2.0×107 b)4.5×107 c)2.0×1010 d)4.5×1013 Homework Equations f=v/wavelength (sorry, I couldn't...