Photometry — MCQs

by
50 Score: 0 Attempted: 0/50 Subscribe
1. What is photometry in astronomy mainly concerned with?





2. The basic unit of luminous intensity in photometry is:





3. Which unit represents luminous flux?





4. What does “lux” measure in photometry?





5. In astronomy, photometry is most often applied to measure:





6. The apparent brightness of a star decreases with:





7. The standard system of magnitudes in photometry was introduced by:





8. In the magnitude scale, a difference of 5 magnitudes corresponds to a brightness factor of:





9. Which modern photometric system uses filters like U, B, V?





10. The “V” filter in UBV photometry corresponds to:





11. Bolometric magnitude measures:





12. The absolute magnitude of a star is defined as its brightness at:





13. The apparent magnitude of a star depends on:





14. A lower magnitude number means a star is:





15. Photomultiplier tubes and CCDs are used in photometry as:





16. The main advantage of CCDs in astronomical photometry is:





17. Differential photometry measures:





18. Which type of stars are most commonly studied with photometry for brightness variations?





19. Eclipsing binary stars can be studied effectively using:





20. Light curves are graphs of:





21. The discovery of exoplanets using the transit method depends on:





22. The Kepler Space Telescope used:





23. Photoelectric photometry was a major advancement because it:





24. Atmospheric effects on photometry include:





25. Which technique corrects for atmospheric effects in photometry?





26. The color index (B–V) in photometry is a measure of:





27. A star with a negative (B–V) color index is likely:





28. The magnitude scale in photometry is:





29. Which effect causes the apparent brightness of stars to vary due to Earth’s atmosphere?





30. Stellar variability is often classified using:





31. Standard stars in photometry are used to:





32. A bolometer in photometry measures:





33. Photometry across different filters is called:





34. Narrowband photometry is useful for:





35. CCD saturation in photometry occurs when:





36. Which noise source affects photometric accuracy?





37. The term “signal-to-noise ratio” in photometry refers to:





38. Ground-based photometry is limited by:





39. Space-based photometry avoids:





40. Which mission revolutionized photometry by detecting thousands of exoplanets?





41. The TESS mission focuses on:





42. The brightness of a variable star that changes periodically is often plotted as a:





43. Photometry helps determine the albedo of planets, which means:





44. Stellar flares are detected using:





45. Which type of variable stars were used as “standard candles” for distance measurement?





46. RR Lyrae stars are important in photometry because they:





47. Photometry across multiple wavelengths helps determine a star’s:





48. Which effect in photometry occurs when light is absorbed by Earth’s atmosphere at certain wavelengths?





49. Photometric redshift estimation uses:





50. The main advantage of photometry over spectroscopy is:





Leave a Comment

All copyrights Reserved by MCQsAnswers.com - Powered By T4Tutorials