Photocell: meaning, definitions and examples

Etymology

• The term comes from combining 'photo', meaning light in Greek, and 'cell', which refers to a basic unit or chamber.
• It was first introduced in the early 19th century, highlighting the growing fascination with light's properties and uses.

Technology

• Photocells are widely used in streetlights to automatically turn them on at dusk and off at dawn.
• They are also used in solar panels to convert light energy into electricity, demonstrating their importance in renewable energy.

Science

• The principle behind photocells is based on the photoelectric effect, where light causes certain materials to emit electrons, leading to electricity.
• They can be made from different materials, with silicon being the most common due to its effectiveness and availability.

Applications

• Beyond lighting, photocells are used in cameras to adjust settings based on light conditions, improving photography.
• They can also be found in various home appliances, such as automatic garden lights that only activate in the dark.

Pop Culture

• Photocells have inspired plays and artworks, where themes of light and shadow symbolize knowledge and ignorance.
• In movies portraying futuristic settings, photocells are often part of advanced technology that automates everyday life.

At rank #29,369, this word represents specialized academic or technical vocabulary. It's less frequently encountered but may be valuable in specific contexts.

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