Flint glass exhibits dispersion: its index is for violet light ( ) and for red light ( )
PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
Flint glass exhibits dispersion: its index is n=1.66 for violet light (wavelength 400nm) and n=1.62 for red light (700nm). For each wavelength, calculate the critical angle when light exits flint glass into air. Then find the difference between the two critical angles (violet minus red) in degrees.