A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens is a single piece of transparent material, while a compound lens consists of several simple lenses, usually arranged along a common axis.
What the chain says
- Block
- 651 441
- Time
- 2020-09-06T21:46:55Z
- Signer
- 12gSWub8xoi4MNxZB4LAXxCfdwRhWeXtX3
- App
- twetch
- Type
- post
- Content type
- text/plain
- Name in tx
- twetch#2755
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Signed by
12gSWub8xoi4MNxZB4LAXxCfdwRhWeXtX3 Verified