Interferometry — MCQs

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1. What is the primary goal of interferometry in astronomy?





2. Interferometry works on the principle of:





3. The effective resolution of an interferometer is mainly determined by:





4. Which famous experiment used an interferometer to detect the motion of Earth through ether?





5. Which interferometer first measured the diameter of stars?





6. In radio astronomy, interferometry is used because:





7. The VLA (Very Large Array) in New Mexico is an example of a:





8. Which interferometer detected gravitational waves?





9. The angular resolution of an interferometer is approximately:





10. Which method combines signals from widely separated radio telescopes?





11. The ALMA array is located in:





12. VLBI stands for:





13. Interferometry improves resolution but not:





14. Optical interferometers are most commonly used to study:





15. The technique of combining signals from multiple telescopes is called:





16. Which interferometer design uses two beam splitters and mirrors?





17. The radio interferometer that provides Earth-sized resolution is:





18. Which interferometer uses twin detectors located in the USA for gravitational waves?





19. Interferometers can measure:





20. A larger baseline in interferometry results in:





21. The SKA (Square Kilometre Array) will be the world’s largest:





22. Which interferometer principle is used in fiber optics for telecommunications?





23. The main limitation of interferometry is:





24. Which interferometer type measures the refractive index of thin films?





25. The technique of combining multiple interferometer signals electronically is:





26. The delay applied to radio telescope signals before combining is called:





27. The first stellar diameter measured using an interferometer was:





28. The interferometer used to test special relativity is:





29. A radio interferometer works by:





30. Which interferometer principle is used in GPS systems?





31. The main advantage of radio interferometers over optical ones is:





32. The Hanbury Brown–Twiss interferometer is used for:





33. What is the main output of an interferometer?





34. Interferometric fringes are produced due to:





35. Which interferometer technique was crucial for Event Horizon Telescope (EHT)?





36. The Event Horizon Telescope achieved resolution by using:





37. Interferometry in space is advantageous because:





38. The technique of removing atmospheric distortion in interferometry is:





39. Which interferometer measured Earth’s rotation through light interference?





40. The main challenge of interferometry is:





41. Radio interferometers typically work in which frequency range?





42. Optical interferometry requires:





43. Which interferometer is essential for quantum optics experiments?





44. The EHT used interferometry to image:





45. Radio interferometers are often built in:





46. The path difference in an interferometer determines:





47. A space-based interferometer mission concept was:





48. Interferometers can also be used in:





49. Which interferometer type is commonly used in spectroscopy?





50. The ultimate resolution limit of interferometry is determined by:





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