Purple Door

Purple Doors are doors that can be opened by a beam using an electrical, oscilating beam, the Wave Beam. They are found only in Metroid Prime. The purple color is actually the color of a force field covering the door. After shooting a purple colored door, the energy covering it will disrupt and disapate, allowing Samus to enter the next room.

They appear in secret areas around the Chozo Ruins, and are found often in the Space Pirates' Phendrana Drifts Lab.