Khan Academy Wiki
Khan Academy Wiki
299,792,458 Meters per Second
299,792,458 Meters per Second
Quickly & correctly answer 75 skill problems in a row (time limit depends on skill difficulty)
Type Earth badge
Energy point(s) awarded 5000
Status Retired
Disclosed? Yes
Repeating? Yes

299,792,458 Meters per Second is an Earth badge. To earn it, the user has to consecutively submit 75 correct answers in any exercise within the time limit, which depends on the difficulty of the skill. Having a slow or incorrect answer means that the user has to start all over again, meaning this badge may be frustrating to achieve. User can find the time limits for each exercise here. This badge can be found here on Khan Academy.

This badge, as all speed badges, can be earned only once per exercise.

Similar badge(s)


  • Before Spring 2011, 299,792,458 Meters per Second was a Sun badge. As more exercises came along and it became easier to get this badge, it was changed into an Earth badge.
299,792,458 Meters per Second as Sun Badge

299,792,458 Meters per Second as Sun badge

  • If the user has 0 points, then earns this badge exactly 2,000 times then they will earn the badge Tesla. This shows you how hard it is to get Tesla! (assuming this is the only way they earn the points without any other of the speed badges and such)
  • 299,792,458 meters per second is the speed of light.