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Author Question: How fast does light travel from Proxima Centuri to Earth? a. 4.2 ly b. 4.2 years c. 3 108 m/s ... (Read 64 times)

futuristic

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on: Jul 27, 2018
How fast does light travel from Proxima Centuri to Earth?
 
  a. 4.2 ly b. 4.2 years
  c. 3  108 m/s d. None of the other choices are correct.

Question 2

How long does light take to reach us from Proxima Centuri?
 
  a. 4.2 ly b. 4.2 years
  c. 8.4 AU d. 8.4 km


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Carliemb17

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Reply #1 on: Jul 27, 2018
Answer to Question 1

c
RATIONALE: Light travels at the speed of light c.

Answer to Question 2

b
RATIONALE: How long refers to time not distance.


futuristic

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Reply 2 on: Jul 27, 2018
Wow, this really help

kjohnson

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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