Leses, window pans, etc are made up of:

Options

A. PVC
B. polythene
C. perspex
D. polystyrene

Answer

To answer the question about what materials are used to make lenses, window panes, etc., we can follow these steps:

### Step 1: Identify the Common Materials Used
- Lenses, window panes, and similar items are typically made from materials that are transparent, durable, and can be molded into various shapes.

### Step 2: Consider the Properties Required
- The materials used must have high rigidity, strength, and clarity. They should also be able to withstand shocks and flexing without breaking.

### Step 3: Identify the Material
- One of the most common materials that meet these criteria is **perspex**, which is a type of acrylic plastic. It is known for its clarity and strength, making it suitable for lenses and window panes.

### Step 4: Conclusion
- Therefore, the answer to the question is that lenses, window panes, etc., are made up of **perspex**.

### Final Answer
Lenses, window panes, etc., are made up of **perspex**.

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