Question

Read paragraphs 3 and 4.

(3) To determine a spacecraft's distance from Earth, navigators send a signal to the spacecraft, which then returns it to Earth. The time the signal requires to make that two-way journey reveals the spacecraft's distance from Earth because the signal travels at a known speed (the speed of light).
(4) While it may sound complicated, most of us use this concept every day.
The grocery store might be a 30-minute walk from your house. If you know you can walk about a mile in 20 minutes, then you can calculate the distance to the store. How does the author help readers understand the method scientists use to determine a spacecraft's distance from earth?

Answer 1

Step-by-step explanation:

The author helps readers understand the method, scientists use to determine a spacecraft's distance from Earth as he says they send the signal to space with the speed of light. And according to them the time that light takes to reach space and come back is the distance between space and the earth.

He also says the same concept is used every day by people he takes the example of the distance of the grocery store from the house he says we a person can walk a mile in sat 20 mins n he takes around 30 mins to walk to the grocery store then by this he could calculate the distance between the grocery store and house.