Name: ________________________________ Lab table # _____ at: 12:00 / 3:00 / 6:00 Name: ________________________________ Name: ________________________________ Name: ________________________________ Part A Fill in the table below: Nominal focal Measured focal Lens length (mm) length (mm) 1 100 200 2 250 3 Part B Fill in the table below. Measure the distance (or from the of the light source x L) front face to the center of the lens (or surface of the screen). Also record the height of the image. 1st location 2nd location (cm) (cm) x1 (cm) h1 (cm) x2 (cm) h1 (cm) L f 10 105 20 25 10 90 20 25 Original size of the source object: h0 (cm) = _______ Part C Plot the data from the Part B table: the focal length vs the lens position Derive a f x. relationship between and To your data graph, add a plot of this function for f, L x. f(x; L) the two values of that we used in this lab (L = 90 cm and = 105 cm). L L Questions Make sure you answer all the questions here.
Name: ________________________________ Lab table # _____ at: 12:00 / 3:00 / 6:00 Name: ________________________________ Name: ________________________________ Name: ________________________________ Part A Fill in the table below: Lens Nominal focal length (mm) Measured focal length (mm) 1 100 2 200 3 250 Part B Fill in the table below. Measure the distance x (or L) from the front face of the light source to the center of the lens (or surface of the screen). Also record the height of the image. 1st location 2nd location L (cm) f (cm) x1 (cm) h1 (cm) x2 (cm) h1 (cm) 105 10 20 25 90 10 20 25 Original size of the source object: h0 (cm) = _______ Part C Plot the data from the Part B table: the focal length f vs the lens position x. Derive a relationship between f, L and x. To your data graph, add a plot of this function f(x; L) for the two values of L that we used in this lab (L = 90 cm and L = 105 cm). Questions Make sure you answer all the questions here.