Brownian motion is the random movement of particles that are suspended in a fluid (such as a gas or liquid). It is caused by the collisions of the pa…
A clock is a device that is used to measure and display time. It consists of a number of mechanical or electronic components that work together to me…
A solar cooker is a device that uses the energy of sunlight to cook food. It is a simple and effective way to cook food using only the sun's rays…
A solar water heating system is a way of using the sun's energy to heat water for domestic or industrial use. There are several types of solar wa…
A solar heating system is a type of renewable energy system that uses solar energy to heat water or air for use in a home or building. There are seve…
Solar light systems use solar panels to convert sunlight into electricity. These systems consist of a solar panel, battery, charge controller, and in…
Reflection of light is the process by which light bounces off a surface. When light strikes a surface, some of the light is absorbed by the surface, …
A rainbow is a meteorological phenomenon that is caused by the refraction, or bending, of light as it passes through water droplets in the atmosphere…