1 - Prism Start over the simulation https://phet.colorado.edu/en/simulation/bending-light and select Prism. Select the prism shape located in the bottom left and drag it in the center. Move the light source as shown in the following image Set the index of refraction to its max possible value (all the way to the right). The goal is to find the index of refraction of the prism using Snell's law. Select the Protractor and display the normal. Measure the incident and refracted angles where the ray enters the prism. Measure the incident and refracted angles where the ray exits the prism. Input the values of your measurements in the table. 21. What is the index of refraction calculated using the data at the entry point? 22. What is the index of refraction calculated using the data at the exit point? 23. What is the percentage difference between the two values of the index of refraction? 24. Look at the surface where the light exits from the material to the air, as you change the color of the ray of light from blue toward red, how does the refracted angle change? Select white light and dark background by clicking the last icon on: 25. What is the name of the physical phenomenon effecting the white lightthat you are observing ? 2 - Focal Point of a Lens Start over the simulation Bending Light and select Prism. Select multiple rays by clicking the middle icon on: The basic principle on how a lens works (in order to magnify an image for example) is the bending of light due to refraction. You will study more in details the process of image formation on your next activity but the key concept is the notion of the focal point: a point where the rays of light meet. Focal point: This point exists only if the refracting material satisfies precise geometrical conditions. Try the multiple rays beam to pass through each object of the different shape below A B C D E 26. Which of the above objects has the property to focus the rays of light to one point? 27. How does the distance of the focal point to the object change as you increase the index of refraction of the object