Maser and nuclear reactor: what they have in common

1. Step 1. Maser — evolved into — Laser. A laser is an optical maser.
2. Step 2. Laser — has part — Mirror. A resonator made of mirrors.
3. Step 3. Mirror — is part of — Periscope. Mirrors or prisms.
4. Step 4. Periscope — is part of — Submarine. A periscope.
5. Step 5. Submarine — evolved into — Nuclear submarine. Nuclear power let submarines stay submerged for months.
6. Step 6. Nuclear submarine — has part — Nuclear reactor. A reactor.

Open Evothings