pencil (Q2068617)
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beam of electromagnetic radiation or charged particles
- pencil of rays
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | pencil |
beam of electromagnetic radiation or charged particles |
|
Statements
Identifiers
1 reference
Sitelinks
Wikipedia(4 entries)
- dewiki Pencil Beam
- enwiki Pencil (optics)
- eswiki Haz de rayos
- fawiki مدادی (نورشناسی)