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?
- ABoth Statement I and Statement II are correct and Statement II explains Statement ICorrect
- BBoth Statement I and Statement II are correct but Statement II does not explain Statement I
- CStatement I is correct but Statement II is not correct
- DStatement I is not correct but Statement II is correct
Explanation
Statement I: Correct. Rare earth elements are indeed used in manufacturing flat television screens and computer monitors for various components including phosphors, magnets, and electronic circuits.
Statement II: Correct and explains Statement I. Some rare earth elements, particularly europium and terbium, have phosphorescent properties that make them essential for creating the phosphors used in display screens. These phosphors convert electrical energy into visible light in specific colors, enabling the display functionality.
The phosphorescent properties of rare earth elements directly explain their application in display technology, making them crucial for modern electronic displays.
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