in the following questions assume nah, = 1 and nwater = 1.33. 1. A light ray hits a 4 cm thick piece of Pyrex glass with an angle of incidence of 40. The glass has an index of refraction of 1.52 and is immersed in air. a. What is the angle of refraction when the light enters the glass? (1 mark) b. What is the angle of refraction when the light exits the glass? (1 mark) c. What is the horizontal shift in the light from where it entered and where it exited the glass? (1 mark) 2. A 12 cm tall glass of water is filled to the rim. A penny is placed at the bottom-centre of the glass. What is the maximum radius of the glass such that all light from the penny escapes the water? You can assume the penny is a point particle. (Hint: Total Internal Reflection will stop the light from escaping the glass) (3 marks) 3. The image below shows an object, an unknown lens and a single Principal Ray. Each square in the grid has sides 1 cm long. a. What type of lens is it? (1 mark) b. What is the focal length? (1 mark) c. Draw the other two Principal Rays and the image of the object. What type of image is it? (real/virtual, inverted/upright) (2 marks) d. Use the Thin Lens Formula to confirm you drew the correct location of the image. (1 mark)4. The image below shows an object, an unknown lens and a single Principal Ray. Each square in the grid has sides 1 cm long a. What type of lens is it? (1 mark) b. What is the focal length? (1 mark) c. Draw the other two Principal Rays and the image of the object. What type of image is it? (real/virtual, inverted/upright) (2 marks) d. Use the Thin Lens Formula to confirm you drew the correct location of the image. (1 mark)