Question

1. Explore tutorial “Simple Magnification”. Describe a concept of a virtual image and what happens to it when the distance between an eye and a lens changes.

https://www.olympus-lifescience.com/en/microscope-resource/primer/java/lenses/simplemagnification/

Answer 1

A simple magnification is a converging lens and produces a magnified virtual image of an object located within the focal length of the lens. ... It is equal to the ratio of the angle subtended by the image to that subtended by the object when the object is observed by the unaided eye.

Magnifying Power The magnifying power of a simple microscope is the ratio of the angle subtended at the eye by the image as seen through the lens to the angle subtended by the object at the unaided eye, when both are placed at the least distance of distinct vision, it is denoted by M.

An example of a Virtual image is your image in a flat bathroom mirror. The light rays reflect away from the mirrors and do not actually pass through the image of yourself. The general rule of thumb to follow is: if the light rays actually pass through the image, then it is a real image.

the image distance, the distance between the lens and the retina, is fixed. If the object distance is changed (i.e., the eye is trying to focus objects that are at different distances), then the focal length of the eye is adjusted to create a sharp image.