A concave mirror is spherical and curves like a spoon and the curved surface has an inner surface that acts as the reflecting surface. Convex mirrors have an outer surface as the reflecting surface. The properties and images formed by a concave mirror are different from those of plane mirrors.Know More
A concave mirror has two focal points, a center of curvature and a radius of curvature. The ray of light parallel to the principal axis passes through a focus point after reflection and forms the image. Images formed by a concave mirror may be diminished, magnified, real or virtual according to the position of the object.
Concave mirrors are used in telescopes and as shaving mirrors. They are also used to manufacture headlights of vehicles to get a parallel beam of light.Learn more about Physics
When a force is applied to an object resting on a surface, a retarding force is that which opposes the force being applied to the object. A retarding force is usually that of friction, which must be overcome when moving an object resting on a surface. If the object is being moved upward along an inclined plane, gravity represents an additional force that must be overcome.Full Answer >
A Gaussian surface is a surface in a three-dimensional space used in Gauss’ law to calculate the flux of a vector field. If the electrical field is constant, the electrical flux can be calculated by multiplying the value of the electrical field by the area of the Gaussian surface.Full Answer >
Geothermal energy is created at the center of the Earth, around 4,000 miles below the surface, through hot spots in plate boundaries. These hot spots contain more energy than all the gas and oil resources in the world and can be found underground and on the Earth's surface in the form of hot springs, volcanoes and geysers.Full Answer >
Waves on the surface of the ocean and lakes are caused by the wind transferring its energy to water. Tsunamis are different from surface waves because they are caused by landslides, volcanic eruptions or underwater earthquakes.Full Answer >