A simple telescope has

Options

A. a convex lens and a concave lens
B. a concave mirror and a convex lens
C. two convex lenses
D. two concave lenses.

Answer

To solve the question "A simple telescope has," we need to identify the components of a simple telescope. Here is a step-by-step breakdown of the solution:

### Step 1: Understand the Components of a Simple Telescope
A simple telescope typically consists of two main optical components: lenses. Specifically, it uses two convex lenses.

### Step 2: Identify the Lenses
1. **Objective Lens**: The first convex lens that captures light from a distant object and forms a small image.
2. **Eyepiece Lens**: The second convex lens, which is placed close to the eye, magnifies the image formed by the objective lens.

### Step 3: Analyze the Options
Now, let's analyze the options provided in the question:
- **Option 1**: A convex lens and a concave lens
- **Option 2**: A convex lens with a concave mirror
- **Option 3**: Two convex lenses
- **Option 4**: Two concave lenses

From our understanding, the correct configuration for a simple telescope is two convex lenses.

### Step 4: Conclusion
The correct answer to the question "A simple telescope has" is **two convex lenses**.

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