This experiment is geometrical optics : optical instrument Second and third pic

Question

This experiment is geometrical optics : optical instrument Second and third pic is procedure and last pic is what I got result from experiment B. Keplerian Astronomical Telescope (-camera+ magnifier). Surprisingly for some, a telescope does not make an image"b ensne!). Instead, they use the objective lens to produce a minified real image, and an igger" than the object (try fitting the eyepiece to expand its angular size to make details more visible to the eye Exit pupil fo Figure 2: Ray diagram for the Keplerian (astronomical refracting) telescope. The resulting angular magnification Ma can be found by similar triangles in the ray diagram 1. This time, our "object" is an illuminated large vernier scale at the far end of the lab. As before, make an inverted real image of this on a screen using the long focal length objective lens. 2. Now place the short-focus converging eyepiece behind the screen by I focal length, remove the screen, and adjust the eyepiece to focus. Record all distances for your report's ray diagram (you may represent the object as being "at infinity" since it is located many focal lengths away). v through the Keplerian telescope with one eye looking at a isions between Pl and P2 in the "object" scale line up with 7.0 divisions le, so the measured angular magnification must be 21/7.0-3.0 3. With one eye looking directly at the scale, and the other looking through the telescope, superpose the images as shown to estimate the angular magnification. Compate this with the theoretical angular magnification Ma-fo fe What is the "tube length" of this telescope?

Explanation / Answer

When used in the reverse order, that is , eyepiece used as objective lens and vis-versa. We will not have any image image as we see that objective is having a larger focal length than eyepiece for getting maximum light from given object. So in that context we cann't observe any image as eyepiece is of short focal length.

From the given data, it shows that angular magnification will not be consistent with original ones. If possible that image is observed in reverse order then it's magnification seems to be greater than what is observed in original one.

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