Across
- 2. is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian, which is used as an amplifier for high radio frequencies, from UHF up into the microwave range.
- 4. is a semiconductor light source that emits light when current flows through it.
- 6. is an electromechanical device that records analog audio and analog video from broadcast television or other source on a removable, magnetic tape videocassette, and can play back the recording.
- 7. is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
- 9. electrical recording of an organ such as the brain and heart.
- 11. an electronic device that can increase the power of a signal.
- 14. was the first practical video camera tube to be used in early television cameras.
- 16. is a small wafer, usually made of silicon, that can hold anywhere from hundreds to millions of transistors, resistors, and capacitors.
- 18. a bi-stable electronic circuit that has two stable states and can be used to store state information.
- 20. a device converting solar radiation into electricity.
Down
- 1. a semiconductor device with three connections, capable of amplification in addition to rectification.
- 3. an early form of capacitor consisting of a glass jar with layers of metal foil on the outside and inside.
- 5. a dry copying process in which black or colored powder adheres to parts of a surface remaining electrically charged after being exposed to light from an image of the document to be copied.
- 8. device that uses IC assemblies to store data persistently, typically using flash memory, and functioning as secondary storage in the hierarchy of computer storage.
- 10. is a device that produces coherent electromagnetic waves through amplification by stimulated emission.
- 12. is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device.
- 13. is a photographic technique that records the light scattered from an object, and then presents it in a way that appears three-dimensional.
- 15. Is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars.
- 17. is a camera that captures photographs in digital memory.
- 19. is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals.