The color of hot objects, such as stars, can be used to estimate theirtemperatures, according to IDEA. For example, the sun's surface temperature is about 5,800 kelvin (9,980 F or 5,527 C). The light emitted has a peak wavelength of about 550 nm, which we perceive as visible white...
A light guide is a device used to direct light from a light source (commonly an LED) to a place where the light is needed. Light guides are also sometimes referred to as light pipes.
To a physicist,lightmeans an energy that is anywhere along the electromagnetic spectrum, from ELF waves to gamma radiation. Visible light is only a narrow part of the spectrum that is most familiar to us because our eyes can detect it. In the Newtonian model of the universe everything is m...
The amount of light a goggle lens allows to pass through is called Visible Light Transmission (VLT). VLT is expressed as a percentage of light allowed through the lens falling between 0% and 100%. The lower the VLT percentage, the darker the lens will be. The higher the VLT percentage, ...
Light is measured in wavelengths, the units of which are nanometers (nm) andmillimetres (mm). Visible light has a wavelength range in the region of 400 to 760nm, with HEV light falling somewhere between the 400-500nm mark. UV light has a shorter wavelength (of between 290 and 400nm) ...
In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum. Today we recognize that light possesses both a wave and particle nature. It is also clear that the limits ...
There are also what is known as Dark Nebulae,opaque cloudsthat do not emit visible radiation and are not illuminated by stars but block light from luminous objects behind them. Much like Emission and Reflection Nebulae, Dark Nebulae are sources of infrared emissions, chiefly due to the presence...
If atoms exist, why can't we see them with visible light? What is the explanation for the pattern of granulation seen on the visible surface of the Sun? What is the combined apparent magnitude of a binary system consisting of two stars of apparent magnitudes 3.0 and 4.0?
Matter—the visible kind, that is—interacts with the universe in many ways. It absorbs and, in many cases, emits electromagnetic radiation in the form of gamma rays, visible light, infrared, and more. It can generate magnetic fields of various sorts and strengths. Matter has mass, creating...
What is a pixelated image? A pixelated image refers to an image that appears blocky or jagged due to the visible individual pixels. This usually happens when an image is displayed at a low resolution or when it is enlarged beyond its original size. When the pixel density is insufficient to...