Lensmaker's equation - comments (high scoring)
The power (1/f) of a thin lens is related to the curvature of its faces (R1 and R2) and the refractive index (n) of the material by the lens equation.[1] Where R is positive if the centre of the circle is to the right and negative if to the left as shown below.Note: this equation is only valid if the surrounding medium is air. In this investigation the validity of this equation will be investigated by ray drawing,...