Consider the following statements:
Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors.
Statement II: Some rare earth elements have phosphorescent properties
Which one of the following is correct in respect of the above statements?
- A.Both Statement I and Statement II are correct and Statement II explains Statement I
- B.Both Statement I and Statement II are correct but Statement II does not explain Statement I
- C.Statement I is correct but Statement II is incorrect
- D.Statement I is incorrect but Statement II is correct
▶ Answer & Explanation
Correct answer: A. Both Statement I and Statement II are correct and Statement II explains Statement I
Rare earth elements, particularly elements like europium and yttrium, are crucial in the production of phosphors used in display technologies. These phosphors emit light (are phosphorescent) when excited by an electric current or UV radiation, enabling the creation of vibrant colors and brightness in screens of televisions and computer monitors.
Source: UPSC gs1 2025