Question

You view an object by holding a 2.5 cm-focal length magnifying glass 10 cm away from it. How far from your eye should you hold the magnifying glass to obtain a magnification of 10×?

Answer 1

To obtain a magnification of 10x with a 2.5 cm-focal length magnifying glass, you need to hold it 100 cm away from your eye.

Step-by-step explanation:

To obtain a magnification of 10x with a 2.5 cm-focal length magnifying glass, you need to hold it at a certain distance from your eye. To obtain a magnification of 10x with a 2.5 cm-focal length magnifying glass, you need to hold it 100 cm away from your eye.

We can use the magnification formula: magnification = -1 * (distance of image / distance of object). Since the magnification is 10x, we can rearrange the formula to solve for the distance of the image: distance of image = -10 * distance of object.

In this case, the object is held 10 cm away from the magnifying glass, so the distance of the image will be 10 * 10 cm = 100 cm. Therefore, you should hold the magnifying glass 100 cm away from your eye to obtain a magnification of 10x.