1) 1. What is the main objective of the experiment? a) a) To study refraction of light b) b) To study reflection of light c) c) To study scattering of light d) d) To study absorption of light 2) 2. Which material is added to water to make the light beam visible? a) a) Salt b) b) Sugar c) c) Milk d) d) Vinegar 3) 3. Why is the laser beam not visible in plain water? a) a) Because light is absorbed by water b) b) Because there are no particles to scatter the light c) c) Because water reflects all the light d) d) Because the laser beam is too weak 4) 4. What happens when milk is added to the water? a) a) The water becomes colourless b) b) The laser beam disappears c) c) Microscopic milk particles scatter the light, making the beam visible d) d) The laser beam bends sharply 5) 5. Which of the following solutions does not show the path of the laser beam? a) a) Salt solution b) b) Milk and water mixture c) c) Detergent solution d) d) Turbid water 6) 6. Why doesn’t the beam appear in salt or sugar solutions? a) a) They absorb the laser light b) b) They are opaque c) c) They completely dissolve, leaving no suspended particles to scatter light d) d) The laser beam is too dim 7) 7. What kind of mixture allows scattering of light? a) a) Homogeneous mixture b) b) Heterogeneous mixture (turbid mixture) c) c) True solution d) d) Suspension with no particles 8) 8. Which phenomenon makes the beam visible in milk water? a) a) Reflection b) b) Refraction c) c) Scattering d) d) Diffraction 9) 9. What happens to light when it hits microscopic particles? a) a) It is absorbed b) b) It is scattered in different directions c) c) It is transmitted without change d) d) It is reflected back completely 10) 10. The experiment demonstrates which real-life phenomenon? a) a) The Tyndall effect (scattering of light by particles in a colloid) b) b) Total internal reflection c) c) Light interference d) d) Refraction in a prism

JKC Std VII Experiment 19 Scattering of Light

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