Reflection and Refraction index in terms of wave length

Wavelength reflective index mu of a material in is the ratio of the speed of light in a vacuum to the speed of light in a medium mathematical heat reflective index given by the formula of speed of light in a vacuum open my speed of light in a medium where is speed of rice is denoted as si and speed of light is denoted in the medium is v principle of reversibility of light state that won the final path of the ray of light after skating suffering any number of reflection and refraction is reserved the re retreats its path exactly it is it is the angle of incidence in denser medium which the angle of reflection in real medium is 90 degree is called the critical angle of denser medium where is refractive index of denser medium rarer medium when the Ray of light travelling from denser medium to rarer medium it indicate the influence of two medium at an angle greater than the critical angle for the two medium they is totally reflected back put denser medium this phenomenon is called total internal reflection it occurs only when angle of incidence is denser medium is greater than the critical angle reflection formula of refraction by convex or concave spherical refracting surface is given by realme U1 and U2 are the refractive index of the rare and denser medium and u v and r are the taken as the the proper sign and effective take place the denser to rarer medium then lenses transparent medium bounded by the two surfaces of which one of both surfaces are spherical lens which is thicker at centre and answer and it is called convex lens convex lens are the two types which are given below double convex lens Plano convex lens concave convex lens.