The image formed by the telescope in normal adjustment position is at

Options

A. D
B. 2D
C. F
D. infinity

Answer

To solve the question regarding the image formed by a telescope in normal adjustment position, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Normal Adjustment of a Telescope**:
- In a telescope, the normal adjustment refers to the configuration where the eyepiece and the objective lens are aligned such that the image formed by the objective lens is at the focal point of the eyepiece.

2. **Identifying the Object**:
- In this scenario, we consider an object that is located at infinity. This is a common situation in telescopes as they are designed to observe distant celestial objects.

3. **Image Formation by the Objective Lens**:
- When light rays from an object at infinity enter the objective lens, they converge at the focal point of the objective lens. This point is where the image of the distant object is formed.

4. **Position of the Eyepiece**:
- The eyepiece is positioned such that its focal point coincides with the image formed by the objective lens. This means that the image formed by the objective lens is at the focal point of the eyepiece.

5. **Final Image Formation**:
- According to the properties of lenses, when an object is placed at the focal point of a lens (in this case, the eyepiece), the image formed is at infinity. Therefore, the final image seen through the telescope will be at infinity.

6. **Conclusion**:
- Thus, in normal adjustment, the image formed by the telescope is at infinity.

### Final Answer:
The image formed by the telescope in normal adjustment position is at infinity.

---