They can travel as far as they want to, provided they have food and water available.
The best way by far (may websites etc) is a Cruise Ship from Southampton to NYC
About 750 miles
Canada
from China, 6400kms away?
110m
If you travel south of South America far enough, you will reach the continent of Antartica.
Well I travel to the water pitcher in my house, so its about 60-80ft
There are more things for the light waves to bounce off of in water, so light can not travel in a straight line or as far.
Infrared light is just light of a specific wavelength it can travel as far as any other wavelength of light.
it travels from the water pipes
it travels from the water pipes