The angle of incidence refers to the angle at which a beam of light hits a surface. It is measured between the incident ray (the incoming beam of light) and the normal line, which is a line perpendicular to the surface at the point of incidence.
The angle of incidence determines the angle at which the light is reflected or refracted. If the angle of incidence is equal to the angle of reflection, the light will be reflected back in the same direction. If the angle of incidence is greater or smaller, the light will be refracted or bent as it passes through the surface.
The angle of incidence and the angle of reflection are equal in a phenomenon called the law of reflection. This means that the angle of reflection is always equal to the angle of incidence, measured from the normal line.
The intensity of light is not affected by the angle of incidence. The intensity of light is determined by the properties of the light source and the material it is passing through, not the angle at which it hits a surface.
Yes, the angle of incidence can be greater than 90 degrees. This is known as an oblique angle of incidence and can occur when light is passing through a medium with a higher refractive index, causing the light to bend away from the normal line.