photoemissive
Học thuậtThân thiện
Definition
- Adjective:
- Relating to or exhibiting photoemission: Describes a material, surface, or effect that involves the emission of electrons when exposed to light or other electromagnetic radiation.
Usage
- The term photoemissive is a technical adjective used primarily in physics and engineering. It modifies nouns to specify their property of releasing electrons due to photon energy.
- It is typically used in contexts discussing photoelectric cells, certain types of detectors, and specialized cathode materials.
Examples
- Adjective:
- The device uses a photoemissive cathode to convert light into an electrical signal.
- Caesium is known for its strong photoemissive properties in the visible light spectrum.
- Research focuses on developing more efficient photoemissive materials for solar energy applications.
Advanced Usage
- "photoemissive effect": The physical phenomenon where light causes electron emission.
- The photomultiplier tube operates based on the photoemissive effect.
- "photoemissive layer": A thin coating designed to emit electrons when illuminated.
- The sensor's sensitivity depends on the quality of its photoemissive layer.
Variants and Related Words
- Photoemission (n): The process or instance of emitting electrons from a surface due to light exposure.
- The experiment measured the photoemission from the metal surface.
- Photoemitter (n): A material or device that exhibits photoemission.
- This compound is an efficient photoemitter in ultraviolet light.
Synonyms
- Photoelectric: While closely related, "photoelectric" is a broader term that can describe effects related to light and electricity, including but not limited to electron emission. Photoemissive is more specific to the emission process itself.
Related Phrases
- Photoemissive cell: Another term for a photoelectric cell or photocell that uses the photoemissive effect.
- Early television cameras relied on photoemissive cells.
Adjective
- of or relating to photoemission