Laser Beam

Exploration Stage: Collector’s House
From: Helen
Description: For a star projector to work, we need to focus the light from the arc lamp into a single beam. We need a monocrystal for this. Could you find one? Without a monocrystal, we won’t be able to see the projection of a beautiful starry sky.
Completed: That’s an excellent monocrystal! It will focus the light beam in the star projector, making it narrow and powerful. And if we were to add a few chromium ions to the monocrystal, we could make a laser!