It means changing colour in resonse to light.
The mathematical term for "mean" is "mean".The popular, or colloquial term for "mean" is "average".
Gradient photochromic refers to a type of material, often used in eyewear or lenses, that changes color or tint in response to varying levels of UV light exposure, creating a gradient effect. This means that the lens will be darker at the top and gradually become lighter towards the bottom, or vice versa, providing both aesthetic appeal and functional benefits, such as improved visual comfort in different lighting conditions. The gradient effect allows for a stylish look while maintaining visibility and protection from sunlight.
No, the math term ratio doesn't mean multiply.
There is no statistical term such as "deviation mean".
mean: average
You can purchase photochromic (color changing) paints at most automotive paint stores.
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Photochromic Sunglasses are the eyeglasses that gets darken when exposed to the sun. Created by Corning in the late 1960s and popularized by Transitions in the 1990s,these are also sometimes called photochromatic. Lenses in photochromic sunglasses rely on a specific chemical reaction to UV radiation.
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they turn darker in sunlight
Photochromic lenses adjust their tint based on the light getting darker in the sun and clearing up inside. They're perfect if you want one pair of glasses that works as both sunglasses and regular glasses. You can find more details at Eyeglass Direct.
The technical term for a lens that has a variable tint is aphotochromic lens (also called photochromatic if you are in America). One of the most well known and commonly sold brands of photochromic lenses are "TRANSITIONS". Photochromic lenses get darker when they are exposed to ultra-violet light, not when you are indoors in a brightly lit room with artificial lights. Photochromic lenses are best suited to slightly cooler climates as they react much quicker and will go darker when they're cold compared to using them in a very hot climate.
Photochromic sunglasses darken when you’re outside in the sun and clear up when you’re indoors, so you don’t need to switch between glasses and sunglasses. Eyeglass Direct has plenty of stylish options with these lenses for both comfort and convenience.
Those are called photochromic lenses. They contain special molecules that react to ultraviolet light, causing the lenses to darken in brightness and clear up when UV exposure decreases.
Photochromic lenses are made by adding special light-sensitive molecules to the lens. When exposed to UV light, these molecules cause the lenses to darken in the sun and clear up when indoors. This is done by either mixing the molecules into the lens material or applying them as a coating.
The mathematical term for "mean" is "mean".The popular, or colloquial term for "mean" is "average".
Photochromic polymers are used in things like glasses, car windows, and smart windows because they change color or darken when exposed to sunlight. You’ll also find them in UV sensors, cosmetics, and security features for added functionality.