3B Scientific SEK Optics - Manual (Page 73)

Exercise
Examine the operating principle of a Dutch telescope!
What do we need?
1 Base plate
1 Dispersing lens “ −100”
1 Focusing lens “+300”
1 Mask
Conducting the experiment
1. Attach the mask to the base plate!
2. Place the “
−100” lens and the ”+300” lens onto the optical axis as marked on the base plate! The
distance between the lenses must be approx. 16 cm!
3. Direct the base plate with both lenses onto a distant object (window, tree etc.)!
4. Move both lenses until you get a focussed image!
5. Describe your observations! Name the features of the image!
6. Name fields of application for a Dutch telescope!
ELWE Physical experiments for education in natural science and engineering
Repr
odu
c
ti
o
n
is
a
llo
w
ed
onl
y
fo
r
u
s
e
w
it
h
E
L
W
E
-e
qui
p
m
en
t.
1 SEG - OP 6.4 Dutch Telescope