onehalfofrobssa
New member
Imagine driving down a street toward a traffic light. How fast would you have to go so that the red light (700 nm) would appear green (500 nm)? What fraction os this of the speed of light, c (c = 300,000 km/s)?
could you explain step by step so that i can understand how to find the answer. thanks.
could you explain step by step so that i can understand how to find the answer. thanks.