1) 1.What type of lens is used in Experiment 10? a) a) Concave lens b) b) Convex lens c) c) Plano-concave lens d) d) Cylindrical lens 2) 2. The aim of the experiment is to determine the: a) a) Radius of curvature b) b) Image distance c) c) Focal length d) d) Object distance 3) 3. For a distant object, the light rays incident on the convex lens are considered to be..... a) a) Diverging  b) b) Converging c) c) Parallel d) d) Random 4) 4. Where is the real and inverted image of a distant object formed by a convex lens? a) a) At the center of curvature  b) b) At the optical center  c) c) At the principal focus d) d) Between the principal focus and the center of curvature. 5) 5. What is the approximate relationship between the image distance (v) and the focal length (f) when a sharp image of a distant object is formed by a convex lens? a) a) v > f  b) b) v < f  c) c) v = f  d) d) v = 2f 6) 6. Which of the following is NOT required as a material for this experiment? a) a) White screen  b) b) Convex lens c) c) Concave mirror d) d) Metre scale 7) 7. Why is it important to use a "distant" object in this experiment? a) a) To make the image brighter b) b) To ensure the incident rays are parallel c) c) To form a virtual image d) d) To make the lens appear larger 8) 8. What type of image is formed on the screen in this experiment? a) a) Virtual and erect b) b) Real and erect c) c) Virtual and inverted d) d) Real and inverted 9) 9. What is the purpose of repeating the measurement for the focal length multiple times and calculating an average? a) a) To make the experiment longer b) b) To introduce more errors c) c) To obtain a more reliable and accurate result d) d) To check if the lens is working 10) 10. If the sharp image of a distant tree is formed at 15 cm from a convex lens, what is the focal length of the lens? a) a) 30 cm  b) b) 7.5 cm c) c) 15 cm d) d) Cannot be determined without object distance

JKC Experiment 10.Determination of the Focal Length of a Convex Lens

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