Refer figure. Core has refractive index `mu_(1)=1.424`. The cladding refractive index `mu_(2)=1.39`. In such a case. Will the light beam propagate?

The optical fibres have in an inner core of refractive index n1 and a cladding of refractive index n2 such that

A thin bi-convex lens made out of a material of refractive index mu_(1) is place in a medium of refractive index mu_(2) . A paraxial beam of light, parallel to the principal axis of the lens, is shown in the figure. Based on the ray diagram, we can conclude that

A thin bi-convex lens made out of a material of refractive index mu_(1) is place in a medium of refractive index mu_(2) . A paraxial beam of light, parallel to the principal axis of the lens, is shown in the figure. Based on the ray diagram, we can conclude that