Reflecting telescope consists of

Options

A. convex mirror of large aperature
B. concave mirror of large aperature
C. Concave lens of small aperature
D. None of these

Explanation

To solve the question "Reflecting telescope consists of," we need to identify the main components of a reflecting telescope.

### Step-by-Step Solution:

1. **Understanding the Components of a Reflecting Telescope**:
- A reflecting telescope primarily uses mirrors to gather and focus light. The key component is the mirror system.

2. **Identifying the Type of Mirror Used**:
- In a reflecting telescope, the objective component is a mirror. Specifically, it uses a concave mirror because it can focus incoming parallel rays of light to a single point.

3. **Considering the Aperture**:
- The aperture of the mirror is essential. A larger aperture allows the telescope to collect more light, which is crucial for observing faint objects in the sky.

4. **Evaluating the Options**:
- The options provided are:
- A) Convex mirror of large aperture
- B) Concave mirror of large aperture
- C) Concave lens of small aperture
- D) None of these
- Among these options, the correct choice must be the one that describes the main component of a reflecting telescope accurately.

5. **Selecting the Correct Answer**:
- Since we established that a reflecting telescope uses a concave mirror with a large aperture to gather light effectively, the correct answer is **B) Concave mirror of large aperture**.

### Final Answer:
The reflecting telescope consists of a **concave mirror of large aperture**.

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