Rainbows form when water in the air reflects and refracts sunlight and disperses the normally white sunlight into colored light. White light is composed of colored light that bends at different angles when reflected and refracted, separating the white light into the distinct colors of a rainbow.Know More
Rainbows are white light dispersed into its spectrum of colors. Rainbows become visible after sunlight and water drops experience a series of actions. First, light refracts when it touches the surface of a water drop. Next, light reflects off the back of a water drop, and lastly, light refracts again as it leaves. These refractions and reflections happen at varying angles that allow different colors to appear.
Dispersion causes the colors of a rainbow to appear in a specific pattern due to unique wavelengths for each color. Blue light has a shorter wavelength than red light and refracts at a greater angle, but dispersion due to the reflection step of the process makes blue light appear at a smaller angle than red. This happens for each color and is why rainbows are colored red, orange, yellow, green, blue, indigo and violet from top to bottom. Rainbows can form full circles, but viewers generally only see the above ground arc.Learn more about Earth Science
Moving air is called wind. Winds are caused by differences in air pressure but can be modified by the Coriolis effect and friction. The movement of winds is generally horizontal, but it can take on a vertical component in a thunderstorm.Full Answer >
Fossils form when a dead animal or plant is covered by sediment. Eventually, the organic matter in the bone or plant, such as the blood vessels and tissue, slowly turns into rock, which becomes known as a fossil.Full Answer >
Deserts form in general from the high atmospheric pressure and cold air that comes from the upper altitudes nearby. The heat from the sun causes high ground temperatures with low humidity.Full Answer >
A glacier forms when a specific environment gets consistent snowfall throughout the year, causing the snow to accumulate rather than melt. The accumulation and compacting of snow by pressure eventually becomes glacial ice. Thus, sufficient moisture in the air and cold air are instrumental in the formation of glacier.Full Answer >