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Name Optics Practical - Worksheet (On-campus version) Activity 1: In-class work (22 marks total) Part A. Focal Length an
Posted: Wed May 25, 2022 6:30 am
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- Name Optics Practical Worksheet On Campus Version Activity 1 In Class Work 22 Marks Total Part A Focal Length An 1 (45.43 KiB) Viewed 16 times
Name Optics Practical - Worksheet (On-campus version) Activity 1: In-class work (22 marks total) Part A. Focal Length and Magnification for a Convex Lens (10 marks total) 1. (2 marks) Estimated focal length of lens (cm): 10cm (1 mark) Briefly explain why the image distance from focusing a very distant object onto a screen or wall allows you to determine the focal length of the lens. 2. (2 marks) į (cm) f(cm) o (cm) 20 30 40 50 Lab group 23 16.5 14.5 13.5 10.7 10.6 10.6 10.6 3. (2 marks) Height of object (cm): 2cm Height of image (cm): -1cm Magnification: image height/object height= -1/2=-0.5cm 4. (2 marks) Theoretical magnification: -0.5 Compare this theoretical value with the magnification in step 3. Do the two results agree? Explain why or why not. 5. (2 marks) Description of what happens to the image as the object distance is moved from about o = 12 cm down to 8 cm. Is the image real or virtual?