Minecraft wiki entry for Beacon, associated text: The top of a beacon's beam.
A view from inside the beacon until Java Edition 19w41a.
Two beams from a beacon, one passing through glass and the other through a beacon block.
Beacon beam going through an end portal frame block.
The first image of a colored beacon, tweeted by Nathan Adams.
The beacon's light changing as it passes through magenta stained glass.
The full visible light spectrum created by colored beacons.
A grayscale spectrum.
A beacon is still functional when the pyramid is made of different blocks.
A visualization of the effects range for each level. At level 4, the area affected is 101×101 blocks.
A beacon with all of the blocks that can power beacons.