The mirror equation :- The ray diagram shows the image A’B’ of an object AB formed by a concave mirror . We derive the mirror equation or the relation between the object distance (u), image distance (v) and the focal length (f). From the above figure the two right angle triangle A’B’F and MPF are…
Consider a ray parallel to the principal axis strinking the mirror at M, CM will be perpendicular to the mirror at M. Let θ be the angle of incidence and MQ be the perpendicular from M on the principal axis, then ∠MCP = θ and ∠MFP =2θ Now tanθ =MQ/CQ and tan2θ = MQ/FQ for…
Definitions regarding spherical mirrors. Pole :- The geometric centre of a spherical mirror is called its pole. Denoted by ‘P’ Principal axis :- The line joining the pole and centre of curvature of the spherical mirror is known as the principal axis. Centre of curvature :- the point in the centre of the sphere from…
Reflection of light :- It is the change in direction of a light at an interface between two different media so that the light returns into the medium from which it originated. Laws of reflection of light :- When a ray of light is reflected from a smooth surface then These laws are valid at…
