Light-controlled home solar lights

Microscope - Illumination, Optics, Magnification: The illumination system of the standard optical microscope is designed to transmit light through a translucent object for …

Light - Electromagnetic, Spectrum, Wavelengths: Heinrich Hertz’s production in 1888 of what are now called radio waves, his verification that these waves travel at the same …

Speed of light, speed at which light waves propagate through different materials. In a vacuum, the speed of light is 299,792,458 meters per second. The speed of light is considered …

Light - Electromagnetic, Wavelength, Spectrum: In spite of theoretical and experimental advances in the first half of the 19th century that established the wave properties …

Light - Photons, Wavelengths, Quanta: By the end of the 19th century, the battle over the nature of light as a wave or a collection of particles seemed over. James Clerk …

Light - Photons, Wavelengths, Particles: The first two decades of the 20th century left the status of the nature of light confused. That light is a wave phenomenon was …

Light is a primary tool for perceiving the world and interacting with it for many organisms. Light from the Sun warms the Earth, drives global weather patterns, and initiates …

One of the most familiar and important forms of energy is light. Nothing is visible to humans when light is totally absent. But light is even more important for other…

Light - Reflection, Refraction, Physics: Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel through a …