| Consider the following statements. |
| 1. A chalcogenide glass is a glass containing sulphur, selenium and tellurium. |
| 2. Chalcogenide glass form the basis of rewritable CD and DVD solid state memory technology. |
| Which of the statement(s) given above is/are correct? |
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither1nor 2
Correct Answer: C
Solution :
[c] Chalcogenide glasses are based on the chalcogen elements: sulphur, selenium and tellurium. These glasses are formed by the addition of other elements such as Ge, As, Sb, Ga etc. They are tow-phonon energy materials and are generally transparent from the visible upto the infrared. It forms the basis of rewritable CD and DVD solid state memory technology.
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