Alfa, R.MinarniSalomo2013-07-252013-07-252013-07-25Rangga Dwijunanda Putrahttp://repository.unri.ac.id:80/handle/123456789/4698A study on Fraunhofer diffraction pattern of a single slit using a He-Ne Laser and Heisenberg uncertainty principle has been conducted. A slit width (s) and a distance from slit to screen (L) are varied to investigate the resulted diffraction patterns. The slit width sizes used are 0,03 mm and 0,06 mm, and L varied from 300-1000 mm. Thedistance between two dark fringes are measured (∆w) until the 5th order and averaged. The an uncertainty constant for Heisenberg uncertainty (A) principle is calculated. The results showed that ∆w values increased as L larger. Uncertainty constant (A) is larger when the slit width (s) smaller with A values equal or bigger than 1, it means the Heisenberg uncertainty principle is proved for the two slits.otherSingle slitFraunhofer diffractionHeisenberg uncertaintyOther