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?
Explanation
Statement I: Correct Rare earth elements like europium, terbium, and yttrium are essential in flat TV screens and monitors due to their role in producing vibrant colors and enhancing display quality.
Statement II: Correct These elements exhibit phosphorescence—absorbing energy and slowly emitting light—which is key to their use in color reproduction and brightness in displays.
Relationship: Statement II explains why rare earth elements are crucial in displays, confirming the reason behind Statement I.
Therefore, both statements are correct and related.