I do not understand what visible and sharp focus mean.
The instruction says....
When viewing the crossed hairs and the top hair is in sharp focus, is the other hair visible or in sharp focus at the following total magnification...?
In the context of your instruction, "visible" and "sharp focus" refer to different aspects of the clarity of an image.
1. Visible: By "visible," it means that you can see the other hair distinctly, even if it's not completely clear or focused. It does not necessarily mean that the other hair is in sharp focus or crisp.
2. Sharp focus: On the other hand, "sharp focus" implies that the hair is clear, well-defined, and in focus. It means that the image is sharp and free from blurriness or distortions.
Now, coming back to your instruction, you are asked to determine the visibility and sharp focus of the top hair and the other hair at a specific magnification level. To answer this, follow these steps:
1. Locate the crossed hairs: Find the crossed hairs in your microscope or the instrument you are using for magnification. These are typically fine lines or wires intersecting each other.
2. Focus on the top hair: Adjust the focus of your microscope or the magnifying instrument so that the top hair is in sharp focus. This means adjusting the settings or moving the lens until the top hair appears clear and well-defined.
3. Observe the other hair: Once the top hair is in sharp focus, observe the other hair and determine its visibility and sharp focus. Pay attention to whether the other hair is clearly visible (even if not in sharp focus) or if it appears blurry or out of focus.
4. Record your findings: Based on your observation, note down whether the other hair is visible or in sharp focus at the given total magnification level.
Remember, the purpose of this instruction is to examine the relationship between magnification and visibility/focus of the crossed hairs. By following these steps, you will be able to determine if the other hair is visible or in sharp focus at the specified magnification.