Light Sensor

How it works

• It sends its colour's power while a laser beam shines into its lens, and stops as soon as the beam is blocked.
• Any laser's beam lights any sensor.
• The lens is narrow: the beam has to land on its small front face, though it may arrive at a steep angle. A beam on the back or sides does nothing.
• Something that crosses the beam cuts the power for a moment.

Tips

• Aim for the middle of the lens. A beam that just misses it does nothing, and the further away the laser is, the finer the aim.
• A ball falling through the beam blocks it for a moment, which makes a quick tripwire.

Where you'll meet it

You first meet it in level 91, First Light, in chapter 10, Laser Lab.

Works with

• Laser
• Mirror
• Trapdoor
• Light Bulb
• Fan