Open Sesame Science
Exploration Center

::: Usually we can not see a faraway object clearly with bare eyes. When we use the telescope, we can see objects in a long distance more clearly.

The faraway object becomes a reduced, upside-down real image through the objective (convex lens). When observed with the eyepiece, the virtual image becomes larger. In the end it is a reduced, upside-down virtual image. Because the virtual image is close to the eyes, as well as the objective is larger than our pupils, we can see more clearly.

Usually we can not see a faraway object clearly with bare eyes. When we use the telescope, we can see objects in a long distance more clearly. The faraway object becomes a reduced, upside-down real image through the objective (convex lens). When observed with the eyepiece, the virtual image becomes larger. In the end it is a reduced, upside-down virtual image. Because the virtual image is close to the eyes, as well as the objective is larger than our pupils, we can see more clearly.