The variation of refractive index of a crown glass thin prism with wavelenght of the incident light is shown. Which of the following graphs is the correct one if `D_(m)` is the angle of minimum deviaton ?

In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations delta_(m) and angle of prism r will be correct?

In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations delta_(m) and angle of prism r will be correct?

In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations delta_(m) and angle of prism r will be correct?

(i) Plot a graph to show variation of the angle of deviation as function of angle of incidence for light passing through a prism. Derive an expression for refractive index of the prism in terms of angle of minimum deviation and angles of prism. (ii) What is dispersion of light ? Why is its cause ? (iii) A ray of light incident normally on one face of a right isosceles prism is totally reflected as shown in fig . what must be the minimum value of refractive index of glass ? Give relevant calculations

(a) Deduce the expression, by drawing a suitable ray diagram, for the refractive index of a triangular glass prisms in terms of the angle of minimum deviation (D) and the angle of prism (A). Draw a plot showing the variation of the angle of deviation with the angle of incidence. (b) Calculate the value of the angle of incidence when a ray of light incident on one face of an equilateral glass prism produces the emergent ray, which just grazes along the adjacent face. Refractive index of prism is sqrt2

(a) Deduce the expression, by drawing a suitable ray diagram, for the refractive index of a triangular glass prisms in terms of the angle of minimum deviation (D) and the angle of prism (A). Draw a plot showing the variation of the angle of deviation with the angle of incidence. (b) Calculate the value of the angle of incidence when a ray of light incident on one face of an equilateral glass prism produces the emergent ray, which just grazes along the adjacent face. Refractive index of prism is sqrt2