A light year is the distance traveled by light in one year. Identify the distance to a nearby galaxy that is 2X106 light years away. (The speed of light is 3X108m/s) A. 10´1015m B. 6´1012m C. 2´1022m D. 1´1018m

A light year is the distance traveled by light in one year. Identify the distance to a nearby galaxy that is 2X106 light years away. (The speed of light is 3X108m/s) A. 10´1015m B. 6´1012m C. 2´1022m D. 1´1018m

The Solar System

10th Edition

ISBN:9781337672252

Author:The Solar System

Publisher:The Solar System

Chapter9: Origins Of Stars, Galaxies And The Universe

Section: Chapter Questions

Problem 3SP

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Concept explainers

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

Question

A light year is the distance traveled by light in one year. Identify the distance to a nearby galaxy that is 2X10⁶ light years away. (The speed of light is 3X10⁸m/s)

	A.	10´10¹⁵m
	B.	6´10¹²m
	C.	2´10²²m
	D.	1´10¹⁸m

Definition Definition Rate at which light travels, measured in a vacuum. The speed of light is a universal physical constant used in many areas of physics, most commonly denoted by the letter c . The value of the speed of light c = 299,792,458 m/s, but for most of the calculations, the value of the speed of light is approximated as c = 3 x 10 8 m/s.

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