This is the experiment from a university Physics Lab course:

Please help with pictures of drawing ray tracing and answer all the questions below.

PROJECT 4. DOUBLE CONVEX LENS The small horizontal lines on the optic axis represent the centers of curvature of the two spherical surfaces of the lens. The point to which the rays converge is called the focal point of the lens. Assume the lens is made of glass with an index of refraction of 1.5. Use three of the rays shown and ray trace using Snell's law twice per ray to determine the focal point of the lens. Measure the focal length. Compare your measurement with the focal length predicted by the lensmaker's equation. What do you conclude? Explain your answer.PROJECT 5. DOUBLE CDHEAVE LENS The small horizontal lines on the optic axis represent the centers of curvature of the two spherical stufaces of the lens. which {as before] has a reaclitre index n = 1.5. In the case of a double concave lens, the emerging rays diverge from a point to the left of the lens. This is called the focal point. P. The distance from the center of the lens to the focal point is called the focal length of the lens. For a diverging lens {such as the double concave lens), this is taken to he negative. Compare your measurement with the focal length predicted by the lensnralcer's equation. What do you conclude? Explain your