Solution Found!
Choose the BEST answer to the following:If a star that is
Chapter 27, Problem 18MCP(choose chapter or problem)
QUESTION:
If a star that is 20 light-years from Earth explodes, gravitational waves from the explosion would reach Earth in
(a) less than 20 years.
(b) 20 years.
(c) more than 20 years.
(d) None of these.
Questions & Answers
QUESTION:
If a star that is 20 light-years from Earth explodes, gravitational waves from the explosion would reach Earth in
(a) less than 20 years.
(b) 20 years.
(c) more than 20 years.
(d) None of these.
ANSWER:Step 1 of 2
Since a light year is the distance covered by light in 1 year, and since gravitational waves travel at the speed of light in vacuum then, the time needed for the gravitational waves from the explosion to reach us is 20 years