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Light usually refers to visible light which is electromagnetic radiation that is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having a wavelength in the range of 400 nanometres (nm) or 400x10-9 m, to 700 nanometres between the infrared with longer wavelengths and the ultraviolet with shorter wavelengths.
The main source of light on Earth is the Sun. Sunlight provides the energy that green plants use to create sugars mostly in the form of starches which release energy into the living things that digest them. This process of photosynthesis provides virtually all the energy used by living things. Historically, another important source of light for humans has been fire from ancient campfires to modern kerosene lamps. With the invention of electricity electric lighting has all but replaced firelight. Some species of animals generate their own light called bioluminescence. For example, fireflies use light to locate mates and vampire squids use it to hide themselves from prey.
Primary properties of visible light are intensity, propagation direction frequency or wavelength spectrum and polarisation while its speed in a vacuum 299,792,458 meters per second is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR) is experimentally found to always move at this speed in vacuum.
light wallpapers for your phone or tablet!
- This feature can tap on the screen and make the image immediately.
- It has support for landscape mode and portrait mode switching screen.
- Beautiful background free and fun are waiting for you!
Instructions to install:
Home - Menu -> Wallpapers.
Movements and flashing light keeps changing with time.
- You can choose from several different styles.
- HD Graphics and Open GL
- Battery usage optimization.
- Compatible with 99% of mobile phone accessories.
- light pictures fully supports landscape and look amazing on tablet devices.
Please contact us if you have any problems with our application.
* Android is a trademark of Google.
نظام الأندرويد المتوافق: Android2.3 or later