On 9/30/05, i_nurachmat <[EMAIL PROTECTED]> wrote:
> Kalau disuruh milih belikan mikroskop atau PS2 saya setuju dengan
> pendapat mas Dwiyatno, akan pilih belikan mikroskop (setuju bukan
> karena saya kebetulan sekantor dengan mas Dwi, tapi karena
> pertimbangan tujuan pemakaian yang lebih mendidik).
Kalau mau murah, mendidik dan tambah kreatifitas untuk anak buat
telescope sederhana aja...
sediakan 2-3 buah kaca pembesar .... (biasanya suka dipajang di toko
buku/alatttulis kantor)
Karton hitam
lem
selotip
gunting
Bagan/skema dapat dilihat di buku Fisika SMP/SMA (Alat Optik/OptikaGeometri)
atau bisa juga liat instruksi dari howstuffwork.com seperti yang saya
lampirkan di bawah ini.
Semoga dapat bermanfaat bagi anak2 kita semua.
Oia.... harap selalu dibimbing masing2 ortu.... namanya teleskop, bisa
dipakai untuk yang tidak tidak .... misalnya mengitip :-)
--
Salam
[H,J]=-ipi
How do I build a telescope at home?
In its essence, a telescope is an instrument that makes a far away
object look closer. To do this, a telescope has a device that collects
light from a distant object (objective lens or primary mirror) and
brings that light (image) to a focus where a second device (eyepiece
lens) magnifies the image and brings it to your eye. To make a simple
telescope at home, you will need the following:
two magnifying glasses - perhaps 1 - 1.5 inches (2.5-3 cm) diameter
(it works best if one is larger than the other)
a cardboard tube - paper towel roll or gift-wrapping paper roll (it
helps if it is long)
duct tape
scissors
a ruler, yard stick, or tape measure
sheet of printed paper - newspaper or magazine will do
To assemble your telescope, do the following:
Get the two magnifying glasses and a sheet of printed paper.
Hold one magnifying glass (the bigger one) between you and the paper.
The image of the print will look blurry.
Place the second magnifying glass between your eye and the first
magnifying glass.
Move the second glass forward or backward until the print comes into
sharp focus. You will notice that the print appears larger and upside
down.
Have a friend measure the distance between the two magnifying glasses
and write the distance down.
Cut a slot in the cardboard tube near the front opening about an inch
(2.5 cm) away. Do not cut all the way through the tube. The slot
should be able to hold the large magnifying glass.
Cut a second slot in the tube the same distance from the first slot as
your friend wrote down. This is where the second magnifying glass will
go.
Place the two magnifying glasses in their slots (big one at front,
little one at back) and tape them in with the duct tape
Leave about 0.5 - 1 inch (1 - 2 cm) of tube behind the small
magnifying glass and cut off any excess tube remaining.
Check to see that it works by looking at the printed page. You may
have to play slightly to get the exact distances between the two
glasses right so that the image comes to a focus.
You have just built a simple refracting telescope! With your
telescope, you should be able to see the moon and some star clusters
as well as terrestrial objects (i.e. birds).
>
>
> --- In [email protected], yohanes ristiyanto
> <[EMAIL PROTECTED]> wrote:
> > Mas kalau mau beli Microscope seyogyanya dipertimbangkan seberapa
> jauh pembesaran yang diperlukan. Agar tidak salah pilih dan tentunya
> juga bisa jadi tidak sesuai keperluan.
> > Tur ja masalah budged ( uang ).Yang jelas Pilih sebatas keperluan.
> >
> > Salam doelcomedie.
> >
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