[Answered] How fast does light travel from Proxima Centuri to Earth? a. 4.2 ly b. 4.2 years c. 3 108 m/s ...

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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 65 times)

futuristic

Hero Member
Posts: 638

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

Sr. Member
Posts: 325

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

Member
Posts: 638

Reply 2 on: Jul 27, 2018

Excellent

nyrave

Member
Posts: 344

Reply 3 on: Yesterday

Gracias!

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