QUESTION 1 An investigation was conducted by a student to determine the effect of distance on the curvature (thickness) of the lens of the human eye. The student sat at the end of a wooden desk in a well-lit room. The student covered the student's one eye with an eye patch A pencil was held in front of the student's uncovered eye for eye 10 seconds The student focussed on the penell until a clear image could be seen and at the same the curvature of the lens of the student's eye was measured with an The student repeated the previous step by placing the pencil at various The student recorded all the data in a recording. optical instrument. Der MAP distances from the student's eye. 11 A The results of the investigation are shown in the table below. DISTANCE OF THE PENCIL FROM THE EYE (cm) CURVATURE OF THE LENS OF THE EYE (mm) 20 40 60 80 100 120 140 4,0 3,6 3,2 2,9 2,7 2,6 2.6 (2) 1.1.1 Formulate a hypothesis for the investigation. 1.1.2 State the name of the process being investigated above. 1.1.3 Describe the changes which will occur to bring about curvature of the lens as the pencil is moved further away from the eye. (5) (1) 1.1.4 State TWO factors which should have been kept constant during this investigation 1.1.5 State ONE way in which reliability of the investigation may be improved. (2) 1.1.6 Describe the relationship between the distance of the pencil from the eye and the curvature of the lens. (2)​