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Measuring density of parrallex objects

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Measuring distances of a parallax object Research Parallax is when one object seen is in such a position where at two angles they seem to be at the same position. Parallax is usually used in astronomy where stars can be seen in parallax. Apparatus * 4 needles * Plain A4 paper * Cork mat * Plain mirror * Block fixing mirror * Bluetak * Protractor * Full length ruler Diagram Image Pins Cork mat Plane mirror Block fixing mirror Normal line to mirror Object Pins Plain paper Method 1. Place the paper on top of the cork mat 2. Place the protractor on the left edge of the paper so you can make a 90o mark on the paper 3. ...read more.


Now place a needle on the first normal line and then place a second needle on the second normal line (make sure both of them are in front of the mirrors) 8. Move down so your eyesight is in level with the first needle and below the mirror 9. Pin your third needle down so it lines up with the first needle and when moving head side to side it looks as if it's one needle 10. Do the same with the third needle, lining it with the second needle 11. When placing the third and fourth needle make sure that the pins are placed behind the mirror such that no parallax is observed when moving head left and right; the image in mirror and pin behind mirror is in vision Results ...read more.


Evaluation The results show that the experiment worked well as the two needles matched together (A1 and A3), although the rest weren't exact matches they were really close and can see which one's should've matched. These inaccuracies could've been created by many reasons such as human error, not lining up the needle accurately or not drawing the normal lines or mirror line perfectly at the right degree. This could also be due to the instruments that we had to do our experiment with such as the protractor was worn out so it was difficult to figure where to draw the right lines and also the width of the mirror at the top where I had to make my measurements from was too wide (about 3mm) so this may have caused a minor deviating measurement from the actual measurement. ?? ?? ?? ?? Manpreet Pahal ...read more.

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