D. Optical Bench (8 marks) Screen For the apparatus shown. Lamp Lens the distance to the object is varied do di and the distance to the image is measured. OBSERVATIONS ANALYSIS Object distance, do Image distance, di (cm) (cm) 25 110 0 .04 35 47.5 D . 029 40 40 0 . 085 50 33 0. 02 60 30 0. 017 70 28 0 . 014 Fill in the table above. Be certain to use standard units. A Physics 30 student determined slope and y-intercept, as shown. Provide the appropriate units for each. If they do not have units, please state this explicitly. Slope = -1.04 y-intercept = 5.08 Using the significance of the y-intercept, determine the focal length of the lens