regarding the objective lens of a telescope and a microscope, for the eyepiece, where and what kind of image is formed?
I kno that the image that is formed is a real, inverted image.. but where is it formed? thanks for your help.
If it is formed in front of the eye lens.
http://en.wikipedia.org/wiki/Refracting_telescope
look at the location of the focal points.
The objective lens of both a telescope and a microscope is responsible for forming an intermediate real image. This image is formed by converging the parallel rays of light from the object being observed.
In a telescope, the objective lens focuses the light rays from distant objects to form a real and inverted image at the focal point. This image is typically located between the objective lens and the eyepiece.
In a microscope, the objective lens also creates a real and inverted image of the specimen being observed. However, in this case, the image is formed within the microscope's body tube which is located closer to the objective lens.
Now, let's move on to the eyepiece. The eyepiece works by magnifying the intermediate image created by the objective lens. It is positioned in a way that it collects and magnifies the light rays from the intermediate image.
In both the telescope and microscope, the eyepiece forms an enlarged and virtual image of the intermediate image. This means that the final image seen by the observer is magnified but not inverted.
So, in summary, the objective lens creates a real and inverted intermediate image, which is then magnified by the eyepiece to form an enlarged and virtual image that is seen by the observer.