3B SCIENTIFIC PHYSICS U17300 Bedienungsanleitung Seite 30

E24a Keplerian telescope
(U17300, transparency D)
The figure from Kepler's telescope is reversed. This can
be verified by obscuring a marginal ray. One can see
that if the top ray is obscured, in the output ray the
bottom ray disappears. The figure is unreal and
magnified.
Objective
E24b Galileian telescope
(U17300, transparency C)
In this experiment the incident angle can be changed.
The larger change of the output angle is observed (the
viewing angle is magnified – the figure is magnified).
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Ocular
The figure is created by parallel rays, so it is unreal
and magnified. If the top ray of the incident beam is
obscured, the top ray of the output beam disappears.
Objective
E25 Camera
(U17300, transparency B)
The lens of the camera is a convergent optical system.
The figure which appears on the rear part of the cam-
era is real and reversed. It is directed onto the optical
material.
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Ocular