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Eratosthene In Agia Paraskevi Greece
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Eratosthene In Agia Paraskevi Greece

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Eratosthene experiment in Lycee Francohellenique d Agia Paraskevi, Eugène Delacroix

Eratosthene experiment in Lycee Francohellenique d Agia Paraskevi, Eugène Delacroix
Agia Paraskevi
Greece

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Eratosthene In Agia Paraskevi Greece Eratosthene In Agia Paraskevi Greece Presentation Transcript

  • Comenius Eratosthenes experiment – Measuring the earth Supervisors: Tzima Anna, Christaki Maria, Kontogiannis Andreas, Karatzas Telemachos Performed by the students of Lycee Franco-hellenique Eugene Delacroix ATHENS 200 9
  • Lycee Franco-hellenique
    • It has 2 departments - the F rench section and the Greek section
    • The French language is taught intensively in the Greek department throughout the whole school year
    • There have been great attempts throughout a student’s life to unite these two Departments by promoting the idea of living together rather than having the parallel life of a stranger in the area you spend most of your time
    • 1 st year high school students are taught Geography,  Biology and Maths whereas Physics and Chemistry are introduced in the 2 nd year
  • Lycee Franco-hellenique
    • Can be found in more than 130 countries. Its aim is:
    • To safeguard the nature of the F rench P ublic E ducat io n S ystem for students of F rench nationality
    • To contribute to the promotion of F rench language and culture
    • To participate in the strengthening of ties with other schools and educational systems
    • To fin an cially support and reward foreign students who excel
  • Supervisors
    • Tzima Anna: Physics Instructor
    • Christaki Maria: Geography and Geology Instructor,
    • Karatzas Telemachos: Technology Instructor
    • Kontogiannis Andreas: Mathematics Instructor
  • Eratosthenes experiment
    • Difficulties with the experiment:
    • The experiment was supposed to take place during the summer solstice
    • If the experiment took place at a random date the deviation from the real value would be too great
  • Our proposal
    • Simulation of the experiment in the laboratory in order for the student to understand the exact procedure
  • The experimental procedure
    • We hypothesised that there is a place in a city where the incidence of sun rays is perpendicular
    • To meet this , we put a mirror on the perimeter of a hoola (the toy game) and demanded that the laser reflected back to its source
  • The experimental procedure
    • Then , by moving the source of the laser parallel to its first position, we found the shadow cast on a small object of about 9 cm in height o n its perimeter
  • The experimental procedure
    • Finally , we measured the distance between the point of incidence of the laser on mirror and the point where the shadow was cast so that the students could find the circumference of the circle using simple geometry and mathematics
  • Comparison of the results
    • By measuring the circumference we found that it was approximately 222 cm
    • On the other hand , Eratosthenes method gave us approximately 221 cm
    • P=2πR=222cm
    • 31 degrees 19 cm
    • 360 X=?
    • X= 221 cm
  • Comparison of the results
    • As see n by the results , Eratosthenes ’ method was extremely accurate and when performed under the right circumstances , it can be very precise.
  • Conclusions
    • The experimental procedure that we used has some very strong advantages:
    • It can be performed at any time of the year
    • The students have the chance to fully understand how Eratosthenes worked at the time with the available knowledge
    • During the summer solstice we are unable to do any experiments s ince we vacation by the seaside :)