1. Figurative analysis concept application. Prove by a solution.

3 2 1 -1 1 -2 -3\fThe Law of reection says that the angle of incidence (Si) is equal to the angle of reection (8r), hence 6i = Br. Snell's Law states that the product of the refraction index (ni) of the incident medium is equal to product of the refraction index (nr) from the refracted medium and the sine of the angle of refraction then ni sine 8i = nr sine Gr. Apply the laws when light travels from air to a glass. Refer to the table for the ni of the two materials, where Bi = 30. Draw to visualize. index index Crown glass Canada Balsam Rock salt Carbon disulphide Ice Water Alcohol Kerosene Dense flint glass Fused quartz Ruby Turpentine oil Sapphire Benzene Diamond