Set 3: Atmospheric Refraction and Scattering of Light
Introduction: This set explores the phenomena of atmospheric refraction and scattering of light, including the twinkling of stars, the blue colour of the sky, the reddish appearance of the sun at sunrise and sunset, and the Tyndall effect.
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PHYSICS | Human Eye-C
📝 Questions: 50
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Q1. What is the bending of light as it passes through the Earth's atmosphere called?
Q2. What causes the twinkling of stars?
Q3. Planets do not twinkle like stars because they are perceived as:
Q4. Why do we see the sun for a few minutes before the actual sunrise?
Q5. Why do we see the sun for a few minutes after the actual sunset?
Q6. The combined effect of advance sunrise and delayed sunset results in:
Q7. What is the phenomenon where a beam of light becomes visible when it passes through a colloidal solution?
Q8. The Tyndall Effect is observed in:
Q9. Which colour of light is scattered the most by air molecules?
Q10. Why does the clear sky appear blue?
Q11. At sunrise and sunset, the sun appears reddish because:
Q12. What is the scientific name for the scattering of sunlight by air molecules and fine particles?
Q13. Which of the following is an example of the Tyndall Effect?
Q14. Danger signals (like on traffic lights) are red because red light:
Q15. Why do astronauts see a dark sky from space?
Q16. The sun appears white at noon because:
Q17. The reddish appearance of the sun during sunrise/sunset is more pronounced:
Q18. Clouds appear white because:
Q19. Which of the following statements about atmospheric refraction is true?
Q20. The path of light is not visible in a true solution (like salt in water) because:
Q21. The colour of light scattered by very fine particles depends on:
Q22. The sun's disc appears flattened at sunrise and sunset due to:
Q23. What would be the colour of the sky if the earth had no atmosphere?
Q24. Which phenomenon explains the blue colour of water in the sea?
Q25. A beam of sunlight becomes visible in a room due to dust particles. This is due to:
Q26. Why are the signals for 'stop' or 'danger' made in red colour?
Q27. The apparent flickering of objects seen through a turbulent stream of hot air is due to:
Q28. The sequence of colours in a rainbow (VIBGYOR) is a result of:
Q29. The phenomenon responsible for the blue colour of some bird feathers (like a kingfisher) is:
Q30. During the day, the sky appears blue, but from the moon, the sky appears black. This difference is because the moon:
Q31. Which of the following is NOT a result of atmospheric refraction?
Q32. If the earth had no atmosphere, how would sunrise and sunset appear?
Q33. The scattering of light by particles whose size is comparable to the wavelength of light is called:
Q34. The blue colour of the sky and the red colour of the sunset are both due to:
Q35. Which of the following would NOT show the Tyndall Effect?
Q36. The advanced sunrise is an apparent phenomenon because:
Q37. In an experiment, a beam of light passes through a solution and its path is visible. The solution is most likely a:
Q38. Why does the sun appear larger at sunrise and sunset than at noon?
Q39. Which colour of light has the longest wavelength?
Q40. The 'duration of the day' is technically longer due to atmospheric refraction by about:
Q41. Which of the following scatters light?
Q42. The white colour of sunlight is a mixture of:
Q43. The primary reason stars twinkle but planets generally do not is that stars are:
Q44. The phenomenon where different colours of light are bent by different amounts is called:
Q45. On a foggy day, it is dangerous to drive with high beam headlights because:
Q46. The blue colour of the sky is most intense:
Q47. Which of the following statements about scattering is FALSE?
Q48. The delayed sunset causes the evening to be:
Q49. A person standing on the earth sees the sky as blue. An astronaut in space sees it as black. This proves that the blue colour is due to:
Q50. The twinkling of a star is due to the atmospheric refraction of starlight. The continuously changing refractive index of the atmosphere causes:
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