How much time does it take a pulse of light to travel through 120 m of water?
time=distance/speedlight
now the speed of light in water is slowed..
speedinwater=speedlightfreespace/(4/3)
look up the speed of light in free space, and memorize it.
a^2 + b^4 = gtrdrvf
To determine the time it takes for a pulse of light to travel through 120 m of water, we can use the formula:
time = distance / speed
The speed of light in a vacuum is approximately 299,792,458 meters per second. However, the speed of light in water is slightly lower, as it is influenced by the refractive index of the medium. The refractive index of water is typically around 1.33, meaning that light travels 1.33 times slower in water than in a vacuum.
So, to calculate the speed of light in water, we can multiply the speed in a vacuum by the refractive index:
speed in water = speed in a vacuum / refractive index
speed in water = 299,792,458 m/s / 1.33
Now that we have the speed of light in water, we can calculate the time it takes for the light pulse to travel through 120 m of water:
time = distance / speed in water
time = 120 m / (299,792,458 m/s / 1.33)
By plugging these numbers into a calculator or conducting the calculation, we find that the approximate time for a pulse of light to travel through 120 meters of water is 0.000398 seconds, or about 398 microseconds.