Link:

https://www.physicsclassroom.com/Physics-Interactives/Refraction-and-Lenses/Optics-Bench/Optics-Bench-Refraction-Interactive

launch the interactive. Place the protractor in the middle. You can move the light source to change the angle of incidence. make a table similar to table 1 and answer the following questions:

1. Is the ray bent when the angle of incidence is 0 degree?

2. Now repeat the procedure for five different angles of incidence as listed in table 1. Measure and record the angle of the refracted ray.

Table 1: Refraction Angle of incidence Angle of refraction 10" 20 Angle of incidence Angle of refraction 30" 50