Repeat the measurements for different angles of incidence to ensure accuracy. 3. Data Analysis

Place the glass plate on a sheet of paper and trace its outline.

By measuring these angles, we can calculate the optical density of the glass. 2. Experimental Procedure

n=sinαsinβn equals the fraction with numerator sine alpha and denominator sine beta end-fraction

Observe the ray as it passes through the glass. Mark the exit point on the opposite side of the plate.