Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:smartphone
|
| gptkbp:component |
gptkb:Crookes_tube
gptkb:Geissler_tube vacuum tube |
| gptkbp:contains |
gas at low pressure
|
| gptkbp:demonstrates |
ionization of gases
|
| gptkbp:emits |
light when current passes through
|
| gptkbp:has_electrode |
anode
cathode |
| https://www.w3.org/2000/01/rdf-schema#label |
Discharge tube
|
| gptkbp:inventedBy |
19th century
|
| gptkbp:operates |
vacuum or low pressure
|
| gptkbp:requires |
high voltage
|
| gptkbp:used_in |
gptkb:J.J._Thomson
gptkb:William_Crookes cathode ray experiments neon signs fluorescent lamps X-ray tubes discovery of electron |
| gptkbp:usedFor |
studying electrical discharge in gases
|
| gptkbp:bfsParent |
gptkb:Sodium_Vapor_Lamp
|
| gptkbp:bfsLayer |
8
|