Question

11.(a) Whatisthenamegiventothecentreofthemirror?
(b) Whatisanoptically densermedium?(1)​

Answer 1

Answer:

(A) The vertex is the geometric center of the mirror. Midway between the vertex and the center of curvature is a point known as the focal point; the focal point is denoted by the letter F in the diagram below.

(B)

An optically denser medium is one that slows down the incident wave, an optical rarer medium is one that causes the electromagnetic wave to pass through faster than in the medium it moved through before. ... As a wave passes from an optically rarer to an optically denser medium the ray bends more towards the normal.