How long does it take a message to travel from earth to a spacecraft at mars at its farthest from earth (about 400 million km)? express your answer to three significant figures and include the appropriate units. t =?

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

i already answered it by 34/s