Question:
How long will it take for a message to come back from Mars?
-
A.
Around 20 minutes -
B.
Only a few seconds -
C.
Almost immediately -
D.
About an hour
Reference explanation:
Correct answer: A
How long does it take for a message to come back from Mars?
A. About 20 minutes
B. Just a few seconds
C. Almost immediately
D. About an hour
Information: there won’t be any real-time communication. Even at the speed of light, communication between the earth and Mars takes about 20 minutes. (there won’t be any real-time communication. Even at the speed of light, communication between earth and Mars takes about 20 minutes.
The answer to choose is: A
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