- When light is reflected by a surface, it exerts a very small push force.
- There is no air resistance in space, so the force of sunlight striking a sail is enough to propel a spacecraft.
- Sunlight is constantly reflected by the sail, which causes the spacecraft to keep getting faster.
Spark a discussion
- Why don't solar sails use wind?
- How do solar sails use sunlight to move?
- What could we use solar sails for?
Explore our resources
Complete your lesson with teaching resources on the Solar System from Tigtag.
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