1.   A Buck Rogers laser shines at the disc while it spins at a precise speed.

2.   A laser shines infrared light through the cables.

3.   The more light that was emitted when the laser shined on a sperm cell, the more DNA the cell contained.

4.   When a CD plays, says Blasche, a laser shines on it and onto the bumps and flat places on the track.

5.   Laser-guided bombs dropped from attack jets will home in on whatever the laser is shining on with pinpoint accuracy, Gordon said.