Dark Energy — MCQs

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1. What is dark energy?





2. Approximately what percentage of the universe is dark energy?





3. Which discovery in 1998 provided strong evidence for dark energy?





4. Dark energy is often associated with which cosmological concept?





5. The cosmological constant was originally proposed by:





6. Why did Einstein introduce the cosmological constant?





7. The equation of state parameter for dark energy (w) in the cosmological constant model is:





8. Which observational project mapped cosmic microwave background fluctuations and supported dark energy?





9. Which survey measures baryon acoustic oscillations to study dark energy?





10. What does dark energy oppose?





11. Which future space mission is dedicated to probing dark energy?





12. The mysterious property of dark energy is that it has:





13. If dark energy continues to dominate, the universe may end in:





14. Which law of physics does dark energy directly influence?





15. Which parameter in the Friedmann equations includes dark energy?





16. Which type of supernova is used as a “standard candle” to measure dark energy?





17. Which Nobel Prize in Physics was awarded in 2011 for discovering dark energy evidence?





18. Which cosmic parameter indicates the contribution of dark energy?





19. In which era did dark energy become dominant in the universe?





20. Which value of “w” suggests phantom dark energy?





21. The accelerated expansion due to dark energy was first detected using:





22. Dark energy density is believed to be:





23. Which constant is linked to dark energy in General Relativity?





24. Which experiment provides evidence through weak gravitational lensing studies?





25. Which type of energy density is thought to dominate in the far future?





26. Dark energy acts like a:





27. Which model assumes dark energy as a scalar field?





28. What is the approximate current Hubble constant value related to expansion?





29. Which effect of dark energy can be measured by galaxy surveys?





30. In the ΛCDM model, Λ represents:





31. Which observational data combination strengthens dark energy evidence?





32. What does the term “fine-tuning problem” refer to in dark energy studies?





33. What is the “coincidence problem” of dark energy?





34. Which type of universe expansion is linked to dark energy?





35. Which mathematical model best explains current dark energy understanding?





36. Which tool will the Nancy Grace Roman Space Telescope use to study dark energy?





37. What is the effect of dark energy on cosmic structure formation?





38. If dark energy density increases, the universe could face:





39. Which method is NOT used to probe dark energy?





40. In General Relativity, dark energy affects the:





41. What is the density parameter symbol for dark energy?





42. The universe’s fate is strongly dependent on:





43. What type of pressure does dark energy exert?





44. What distinguishes dark energy from dark matter?





45. Which force does dark energy most closely oppose?





46. What is one leading alternative to dark energy explanations?





47. Which particle physics field might explain dark energy?





48. Which unit is commonly used to describe the Hubble constant in dark energy studies?





49. The accelerated expansion of the universe due to dark energy implies:





50. Dark energy research is important because it:





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