If the maximum time between the emitted and received pulse is 1 / 10 second, what is the farthest distance you could measure with the sensor? (This question requires units.)

d = 2,998 10⁷ m

Explanation:

The speed of an electromagnetic wave is the speed of light

c = 2,998 10⁸ m / s

This speed is in a vacuum, when the light is in a material medium, its speed is lower than this, even when the order of magnitude is maintained.

Since the speed of a wave is constant, we can use the kinematic relationship

c = d / t

d = c t

Let's calculate

d = 2,998 108 0.1

d = 2,998 10⁷ m

in the vacuum or air