Travel at Light Speed?
Classes 8–12 · about 10 minutes · free, no sign-up
What you will learn
Understand time dilation: moving clocks run slow, more and more near light speed.
How to play
- Pick a star and a speed.
- Fly there and back and compare the twins' ages.
- Find the speed that reaches the centre of the galaxy in one lifetime.
Go deeper
Notes, practice questions and tests for the same topic:
Motion in a straight line NCERT chapters →More in Space Lab
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Squash the Earth into a black hole the size of a marble, and watch light bend and fall in.
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