Type of Mirror Diameter (cm) Focal Length (cm) Concave Concave Concave 8 Concave 105 76 Concave 120 6 Convex Convex Convex Convex 105 Convex 120 Table 1 1. What happens to the distance of the focal length from the mirror as we increase the diameter (size) of the concave mirror? as We Increase it 2. What happens to the distance of the focal length from the mirror as we increase the diameter (size) of the convex mirror? Now set the diameter to 90 cm. Choose either 'Concave' or 'Convex' depending on the chart. Change the radius of curvature to the given values on the table. Using the horizontal ruler from the top right of the page, measure the Focal Length. Again, don't worry about the location of the object for this part. Type of Mirror Radius of Curvature (cm) Focal Length (cm) Concave 150 Concave 175 Concave 200