Measurements 1. Print out ruler and watch video. They are available on MyLS 2. Place the ruler directly over the center of your right pupil so that the ruler is horizontal. Place against forehead for added stability. Stand in front of a mirror. 3. While looking straight ahead, measure the distance from the center of your right pupil to the center of your left pupil. 4. Repeat 5 times and process your data with standard deviation and standard deviation of mean. Write summary of your measurement and include your calculations. Make sure the summary is about one page (preferably less). Your post lab task will grade this as though it were a normal assignment and marked before your next session. The due date for this PT is one week from before your next lab. 1. What is absolute uncertainty? (+one example) 2. What is relative uncertainty? (+one example) Reference: From https://ca.eyebuydirect.com/