Reflection and refraction

David Brewster a Scottish physicist also known as the father of modern experimental optics is remembered by physicists  for his work in Optics specially on the polarization of light. Brewster law is a simple relationship between the angle of polarization and the refractive index of the medium. It states that the tangent of the polarized […]

The time when the upper rim of the Sun appears on the horizon in the morning is known as sunrise (or sunup). The word can also apply to the full process of the sun disc crossing the horizon and the atmospheric disturbances that follow it.  The daily disappearance of the Sun below the horizon owing