Home » Ask Physics » Light Year

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 3,067 other subscribers


Light Year

Share with:

A Light Year is the distance travelled by light in vacuum in one year. How many metres are there in one light year?  (Noor asked)


Speed of light in vacuum is 3 x 108 m/s

1 year = 365 days = 365 x 24 hours=365 x 24 x 60 minutes = 365 x 24 x 60 x 60 seconds

We know that distance = speed x time


1 LY = 3 x 108 x 365 x 24 x 60 x 60 m = 9.460528405×1015 m

Ask a Doubt

Post your Physics Doubts here

Name (required)

Email (required)



Upload a file if required


Half Yearly Exam Count Down

Half Yearly Exam Count Down KVS Ernakulam RegionOctober 17th, 2017
The Half Yearly Examination for Kendriya Vidyalayas of Kerala starts from 17 October 2017
%d bloggers like this: