Water glass is used for making the lenses of telescopes.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Statement**: The question states that "water glass is used for making the lenses of telescopes." We need to determine if this statement is true or false.

2. **Defining Water Glass**: Water glass is an amorphous solid, which means it lacks a well-defined crystalline structure. It is also referred to as a supercooled liquid, but this does not imply it has the same properties as traditional glass used in optics.

3. **Identifying the Requirements for Telescope Lenses**: Telescope lenses need to have a high field of view to effectively focus on distant objects. This requires lenses that can bend light appropriately.

4. **Comparing Water Glass with Optical Glass**: Optical glass, which is used in telescopes, is specifically designed to have curved surfaces that enhance its ability to focus light. In contrast, water glass has a straight surface, which limits its optical capabilities.

5. **Conclusion**: Since optical glass is necessary for the functionality of telescopes and water glass does not meet these requirements, the statement that "water glass is used for making the lenses of telescopes" is false.

6. **Final Answer**: The statement is false; telescopes use optical glass, not water glass.

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