Diameter1.2 tenths m
6.6 thousandthsBowling lane lengths
12,000Dust particles
120 mm
Photo from Wikimedia Commons
Blu-ray Disc
100 billion bits etched by blue laser light/Computing
A standard Blu-ray disc stores 25 GB on a single layer using pits just 150 nanometers wide read by a 405 nm blue-violet laser. The data spiral on the disc, if unwound, would stretch about 27 km. The disc spins at up to 10,000 RPM during playback. Dual-layer discs hold 50 GB, and Ultra HD Blu-ray can store up to 100 GB on three layers.
Measurements
Thickness1.2 thousandths m
127 sextillionthsLight-years
240,000iPhone transistors
50.5 millionthsTennis court lengths
1.2 mm
Weight1.6 hundredths kg
53.3 trillionthsSupertanker loads
11 millionthsHelicopters
16 grams
Capacity (single layer)25 billion B
10,000iPhone photos
4.9 hundredthsLaptop hard drives
25 billionText characters
25 GB
Data spiral length27,000 m
13,300Door heights
18 millionAnt antennae
123 trillionSilicon atoms
About 27 km
Pit width150 billionths m
536 billionthsRugby ball lengths
69.4 billionthsShaquille O'Neals
150 nm