mujhe kaleidoscope bana hai school project hai to me kitne length and breadth ka plane mirror loo
PLEASE. HELP.
Answers
Explanation:
Supplies
Cardboard Tube (from a paper towel roll)
Cereals Box (flexible cardboard)
Mirror
Colorful Beads (transparent, plastic or glass)
Clear Plastic Sheet
Duct Tape
Tools
Glass cutter
Glue Gun & Glue Sticks
Exacto Knife
Scissors
Pair of Compasses
Permanent Marker
Ruler
Pyrography tool (optional)
Notepad/Paper
Pencil
STEP 2: MEASURING & DECISION MAKING
At this point you have to measure:
cardboard tube diameter so you can find the circle radius (mine inner r = 2.15cm, outer R = 2.3cm)
mirror length/width/thickness (mine 25cm x 15.3cm x 0.25cm)
decide:
your Kaleidoscope length (mine 18cm, Tube + End Cap = 17cm +1cm)
calculate:
mirror pieces dimensions (mine 15.3cm x 3.5cm)
If you measure the diameter of the tube and then divide it by 2 you will find the radius. In the future steps you'll need both inner r (from the center to the inner edge of the tube) and outer R (from the center to the outer edge of the tube) radius.
STEP 3: 3-MIRROR SYSTEM
Be Safe!
Before stepping on this process you have to make sure you are safe and there are no chances of hurting yourself! Wear safety glasses and gloves so you won't cut your hands with the sharp edges and protect your eyes from flying chips of glass.
Cut the Mirror
Take a marker and mark the cutting lines using the ruler. Use the Glass cutter to cut your mirror. If you've never done it before you may find helpful this Instructable on how to cut glass.
Glue the 3-Mirror system
After you cut your mirrors glue them in place with a glue gun and insert the 3-mirror system in the cardboard tube (I missed taking pictures of that part so I show you with a piece of cardboard how it might look). If it is a little loose, put some more glue on the edges till it fits perfectly and is not moving in the tube.
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STEP 4: EYEPIECE
Take the cereals box, the inner (r) radius we measured in the Measuring step and the pair of compasses and draw a circle with a much smaller one in the center of it, so you form an eyepiece. Cut it and paint it with a thick marker as I did, or just leave the decoration for the end. I decided to paint it because after this step I wouldn't be able to paint on the glue. On the back side (will be inside the tube), glue a piece of clear plastic sheet. Now, depending on the decisions you made earlier you have to glue the eyepiece on the cardboard tube. I left a gap of about 1cm from the edge of the tube and the mirrors, so I glued my eyepiece inside the tube. If you want to glue it on the edge of the tube it's easier to use the outer (R) radius.
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STEP 5: ROLLING PART SUPPORT
I want to make a moving-rolling part on my kaleidoscope, that will be larger than the main tube and will need support, so it won't bend. As I told you in the beginning of this Instructable I had to hurry and think quick, so I ended up with this. It is a little bit ugly and complex, but it worked. After I glued all the things in place I thought that I could do the same, easier using pieced of polystyrene.
So, I cut 6 cardboard rings out of the cereals box. The inner radius of the ring is the outer radius of the cardboard tube (R) and the outer radius of the ring is the the outer radius of the tube plus 0.5cm (R'). In my case R = 2.3cm and R' = 2.3 + 0.5 = 2.8 cm.
I glues 4 rings to support the large, moving tube, 1 ring to adjust it on the back part of the large tube and 1 to adjust it on the eyepiece and the front part of the large tube.
Now, if you had time, things would be easier, but they weren't for me. :P
I didn't do any calculations to find out the dimensions of the piece of cardboard I needed for the large-moving tube. I just knew I want the width to be 10cm so I cut it that way and let the length longer. I wrapped around the supporting rings with the flexible cardboard and I marked the length I wanted with a pencil. That worked for me because in that step this was the only thing that could make my life easier.