question_answer

To measure the refractive index of the material of a prism, we have to use

A)  the prism of any angle and light of any wavelength  

B)  the prism with angle \[60{}^\circ \] and the white light only

C)  the prism of angle \[60{}^\circ \] and sodium light only

D)  the prism with angle \[60{}^\circ \] and any wavelength light