Question

drwa daigram for concave mirror of radii 5cm 7cm and 10cm with comman centre of curvature. calcuate the focal length of each mirror. draw a ray parallel to the comman principal axis and draw reflect for each mirror​

Answer 1

Answer:

In the given figure a ray of light BP' traveling parallel to the principal axis PC is incident on a spherical mirror PP'. The distance PF is equal to the focal length f. C is the centre of curvature. The distance PC is equal to the radius of curvature R of the mirror. P'C is the normal to the mirror at the point of incidence P'. In the given figure a ray of light BP' travelling parallel to the principal axis PC is incident on a spherical mirror PP'. After reflection, it goes along P'R, through the focus F.