A medium has `n_v = 1.56, n_r=1.44`. Then its dispersive power is:

For a material medium, the values of refractive index for violet and colours are given as n_(v) =1.56 and n_r=1.44 . The dispersive power of a prism made out of this material is

For a material medium, the values of refractive index for violet and colours are given as n_(v) =1.56 and n_r=1.44 . The dispersive power of a prism made out of this material is

Light of wavelenght 4000 A is incident at small angle on a prim of apex angle 4^(@) . The prism has n_(v)=1.5 and n_(r)=1.48 . The angle of dispersion produced by the prism in this light is:

Light of wavelenght 4000 A is incident at small angle on a prim of apex angle 4^(@) . The prism has n_(v)=1.5 and n_(r)=1.48 . The angle of dispersion produced by the prism in this light is:

It mu_v=1.5230 and mu_R = 1.5145 , then dispersive power of a crown glass is

A prism has R.I.for violet and red n_(v) =1.523 n_(r)=1.5145 If the angle of prism is A=2 ^ @ the dispersive power of the prism is :

If refractive index of red, violet and yellow light are 1.42, 1.62 and 1.50 respectively for a medium. Its dispersive power will be

When a ray of sun light passes through the prism, each colour of light has its own speed in the glass. The seven colours come out of the prism with different angles of deviation. Red deviates least and blue deviates maximum. Thus a prism can disperse a white light into seven colours which is called colour spectrum. For a thin prism, the angle of deviation is given as delta=(n-1)A . The angle of dispersion is given as phi=delta_(v)-delta_(r) . The dispersive power of a prism is omega=(phi)/(delta_("mean"))=(phi)/(delta_(y)) Using the above ideas, give answer the following questions. A prism has R.I. for violet and red n_(v)=1.523, n_(r)=1.5145 . If the angle of prism is A=2^(@) the dispersive power of the prism is :