please any can tell ans.
Answers
Explanation:
(7a)Parallel: When rays from a distant point source travel parallel to each other in a particular direction, it forms a parallel light beam. The ray from the sun is an example of a parallel beam of light. Convergent: In a convergent beam, the light rays from a source of light, eventually meet or converge to a point.
(b) The Rectilinear Propagation of Light describes that Light travels in a Straight Line. A mirror changes the direction of Light that falls on it and it travels in a Straight line Path. Reflection of Light occurs when light bounces off a polished surface.
(c) The north magnetic pole is a point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downward. There is only one location where this occurs, near the geographic north pole
(d) Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction.
(e) A field line is a graphical visual aid for visualizing vector fields. It consists of a directed line which is tangent to the field vector at each point along its length.