Light travels at a speed of about 3.0 108 m/s. (a) how many miles does a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye? δx = 3 mi (b) compare this distance to the diameter of earth. (use 6.38 106 m for the radius of the earth.) δx de =

Speed of light is given as

time interval is given as

so the distance covered by the light is given as

now as we know that

so the distance moved by light is

now for the comparision of this distance with diameter of earth

as we know that radius of earth is

so the diameter of earth will be

now the ratio of diameter with the distance that light move will be

so it is 2.35 times more than the diameter of earth

d. air pressure decreases as altitude increases.

connect the batteries in series and hope