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Light waves travel through a vacuum (empty space) so they don't have a medium

The color with the highest frequency is:
A wave of visible light has a frequency of
While on Burch, you see a lightning bolt flash across the sky, and then hear the thunder a few seconds later. The next day, you hike over to the spot the lightning struck and find that it was 1500 m away from where you were when you saw it.
If the speed of light is
While on Burch, you see a lightning bolt flash across the sky, and then hear the thunder a few seconds later. The next day, you hike over to the spot the lightning struck and find that it was 1500 m away from where you were when you saw it.
If the speed of sound is 320 m/s, calculate how much time passes between the lightning bolt hitting the ground and the sound of thunder traveling to your ears.
The color with the longest wavelength is:
The color with the highest velocity is: