17. ožujka 2021.

EXPERIMENT: Kako nastaje duga?/"How Is A Rainbow Formed"



A fun and easy STEM activity to explore how rainbows are formed.




Ovo je jednostavan eksperiment kojim djeci možete predočiti kako nastaje duga i uvesti ih u očaravajući svijet fizike. Aktivnost također spada u STEM aktivnosti, a više o STEM-u možete pročitati u  Što je stem?

This is a simple experiment that can help children understand how a rainbow is formed and introduce them to the fascinating world of physics. The activity also falls under STEM learning.



Uvod u eksperiment/INTRODUCING THE EXPERIMENT


Prije izvođenja eksperimenta pitajte djecu što znaju o dugama: kada se pojavljuje i kako nastaje. Možete pogledat i različite edukativne video materijale na youtube kanala kao npr.:

Before starting the experiment, ask the children what they know about rainbows — when they appear and how they are formed. You can also watch a few educational videos on YouTube channels, for example:




Neposredno prije izvođenja eksperimenta, uz slikovne aplikacije,  objasnite djeci da duga nastaje prolaskom bijele sunčeve svjetlosti kroz kapljice kiše gdje se ta svjetlost lomi i razdvaja u boje dugina spektra te da jednostavnim eksperimentom i vi možete stvoriti dugu.

Right before starting the experiment, use visual aids to explain to the children that a rainbow is formed when white sunlight passes through raindrops, where the light bends and splits into the colors of the rainbow spectrum. Tell them that with a simple experiment, they can create a rainbow themselves.





For the experiment, you will need:


  • a CD placed at an angle in a glass container filled with water (to imitate a raindrop)
  • a flashlight
  • black and white paper to reflect the rainbow (optional: the light can also be reflected on a wall)
Place the paper vertically in front of the container with the CD. When you shine the flashlight onto the CD, the rainbow will be reflected on the paper, just like in the pictures.

Za eksperiment ćete trebati:

  • cd položen pod kutom u staklenu posudu s vodom (imitacija kapljice vode)
  • ručna svjetiljka
  • crni i bijeli papir na kojemu ćemo reflektirati dugu (opcionalno: svjetlost se može reflektirati i na zidu)
Papir položite okomito ispred posude s cd-om. Kada uperite svjetlost prema cd-u duga će se reflektirati na papiru kao na slikama. 






Nakon odrađenog eksperimeta i razgovora o istome predlažem likovnu aktivnost crtanja flomasterima ili drvenim bojicama "Kako nastaje duga"s ciljem dokumentiranja usvojenih znanja ispoznaja. 

After completing the experiment and discussing it, I suggest an art activity where children draw with markers or colored pencils on the topic “How a Rainbow Is Formed.” The goal of this activity is to document their newly acquired knowledge and understanding.






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