Adaptive Optics — MCQs

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1. What is the main purpose of adaptive optics in astronomy?





2. Atmospheric turbulence causes what effect in ground-based telescopes?





3. Adaptive optics uses:





4. The distorted wavefront of light is corrected by:





5. What type of sensor is used to measure atmospheric distortions?





6. Adaptive optics systems typically use what to provide a reference point in the sky?





7. When no bright natural star is available, adaptive optics use:





8. Laser guide stars are produced by exciting atoms in which layer of the atmosphere?





9. Sodium atoms in the atmosphere are excited with lasers to create:





10. Adaptive optics primarily improves a telescope’s:





11. The first astronomical adaptive optics systems were developed around:





12. Which country’s military research originally advanced adaptive optics?





13. The main limitation adaptive optics solves for ground-based telescopes is:





14. Adaptive optics can make ground-based telescopes rival:





15. In astronomy, “seeing” refers to:





16. The speed of deformable mirror adjustments is usually:





17. Multi-conjugate adaptive optics use:





18. Extreme adaptive optics (ExAO) are designed mainly for:





19. Which major telescope is known for pioneering adaptive optics in astronomy?





20. Adaptive optics is less useful for which type of telescope?





21. Wavefront sensors compare incoming starlight to:





22. Which type of wavefront sensor is most widely used in adaptive optics?





23. The main challenge for adaptive optics in visible light is:





24. Adaptive optics corrections are performed in:





25. Which technology is sometimes combined with adaptive optics for sharper images?





26. Ground-layer adaptive optics (GLAO) corrects for:





27. The European Extremely Large Telescope (E-ELT) will rely heavily on:





28. Adaptive optics benefits infrared astronomy because:





29. Which space agency has invested heavily in adaptive optics for ground telescopes?





30. The Gemini Planet Imager uses adaptive optics for:





31. Adaptive optics also finds applications in:





32. What limits the field of view in adaptive optics systems?





33. Pyramid wavefront sensors are an alternative to:





34. The main disadvantage of laser guide stars is:





35. Adaptive optics improves telescope resolution close to the:





36. Which adaptive optics technique combines multiple laser guide stars?





37. “Lucky imaging” is an alternative method to AO that:





38. The main power requirement of adaptive optics systems comes from:





39. Deformable mirrors in AO are controlled by:





40. The AO system at Keck Observatory improved imaging of:





41. What is the typical size of deformable mirrors in adaptive optics?





42. How does adaptive optics affect spectroscopy?





43. Which large telescope will use adaptive optics to directly observe Earth-like planets?





44. Multi-object adaptive optics (MOAO) corrects:





45. Adaptive optics requires very fast computing because:





46. In medical applications, AO is used to:





47. The first successful AO system for astronomy was installed on a:





48. Adaptive optics cannot correct distortions caused by:





49. Extremely Large Telescopes (ELTs) will depend on AO because:





50. The ultimate goal of adaptive optics in astronomy is to achieve:





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