First LED created by Oleg Losev in 1927. Commercial LEDs appeared in 1962 with infrared emission. LEDs convert electricity into light through electron-hole recombination
Color temperature compares visible light to ideal black body emission. Expressed in kelvins (K), with 5000K being cool and 2700-3000K warm. Sunlight has color temperature of about 5900K above atmosphere
Stroboscopic effect creates illusion of motion through aliasing of continuous motion. Simon Stampfer coined term in 1833 for his phenakistiscope. Occurs when short light interruptions replace figures in slightly different positions
Visible light spans 400-700 nm wavelength range. Light travels at 299792458 m/s in vacuum. Light consists of photons, which can be analyzed as both waves and particles. Light pressure causes physical forces on objects in its path
Plants need light, air, water, nutrients, and adequate space to thrive. Light is crucial for converting carbon dioxide into food. Plants require fresh air through respiration and carbon dioxide absorption. Water comprises 95% of plant tissues and provides structural support. Nutrients are essential for plant health and growth
Pika Pika no Mi is a Logia-type Devil Fruit that enables users to transform into light. The fruit was discovered by Admiral Kizaru (Borsalino). The name "Pikapika" means glimmering or shining light in Japanese