Testing Out The Crystal

She then started looking around the place.

Meanwhile, Alex was inside another house, not far from the place where they made a camp. 

Petricia was following beside him. If Emily was learning what kind of civilization lived here before, Alex was busy tinkering with the crystal. 

He used his hammer to break one of the chairs apart, and then from the pieces of it, he started experimenting.

The first thing he did was think about what kind of stimulus was created when they came to the building.

'When I first arrived, I fell in the building. Is it because of that? The crystal absorbs kinetic energy?' But Alex quickly shook his head; this didn't make sense. 

If this is true, doesn't that mean those living here would need to hit the house every day to make it glow?

Based on Alex's observation, the crystal would give out enough light, not too bright that it hurt normal people's eyes, nor it too little that makes everything dark.