Telescope question?

Question

What is the function of the eyepiece with regard to the image formed by the objective lens. Where is the image of the objective lens formed?

Answer 1

The function of the eyepeice is to focus the light from the objective in such a way that it forms the image on the retina in your eye, allowing you to see it properly.

Answer 2

The main objective lens or mirror collects a volume of light and concentrates it at a focal point. This creates a budget of light that for the eyepiece to work with. The eyepiece then manipulates that light to create a visible image for you. That image might encompass a relatively wide field at low magnification, where the light budget is used primarily to brighten the image to make a very dim object bright enough for your eyes to see it. Or, it can be used with a stronger eyepiece to enlarge a very small part of the field.

The eyepiece controls the power and filters the image while the main objective provides the concentrated light and the resolving quality of that focal point.

Answer 3

ew... optics.

there is a lot to know about optics, so i recommend take a class or read a book.

if you GOTTA know... try this:

X () > f

where X is the object you are looking at, () is a simple lens (double convex, in this case) and > is the light focusing to a point (f)

now, you asked where does the eyepiece come in?

X () > () x

now we have an eyepiece... the second () lens, and an IMAGE of the object X, (x)

If you wanna see and image, you need the eyepiece... to understand this better, examine the 'rays' of the original image... they are > after the () then < after the f. the eyepiece flips rays and makes a focus on your eye.