SmartphoneHologramHologramsarenolongerasciencefictionfantasyoratechnologyfromthefuture!Observethepropertiesof

diffractinglighttocreateanopticalillusionthatresemblesa3Dhologram.TEKS:SCI5.6C:Thestudentisexpectedtodemonstratethatlighttravelsinastraightlineuntilitstrikesanobjectortravelsthroughonemediumtoanotheranddemonstratethatlightcanbereflectedsuchastheuseofmirrorsorothershinysurfacesandrefractedsuchastheappearanceofanobjectwhenobservedthroughwater.TECH6.1A:Thestudentisexpectedtoidentify,create,andusefilesinvariousformatssuchastext,rasterandvectorgraphics,video,andaudiofiles.TECH6.6H:Thestudentisexpectedtodiscusshowchangesintechnologythroughouthistoryhaveimpactedvariousareasofstudy.Materials:

• Clearplastico Suchas:aCDcase,rectangularplasticbottle,plexiglass,ortransparencyfilm

• Cleartapeorsuperglue• Graphpaperortrapezoidtemplate(providedbelow)• Permanentmarker• Ruler• Scissorsorexactoknife• SmartphonewithaccesstoYouTube

HowTo:

1. Drawatrapezoidonthegraphpaperthatfollowsthedimensions1cm(b1)X3.5(h)cmX6(b2)cm,orusethetemplatetrapezoidbelow.

2. Cutoutyourtrapezoidtemplateandplaceontopofyourplasticmaterial.3. Useapermanentmarkertotracethetrapezoid,thenusescissorsoraknifetocuttheshapeoutofthe

plastic.4. Repeatsteps2and3tomakefourplastictrapezoids.

5. Usetapeorsupergluetosecurethesidesofthetrapezoidstogether.Orientthetrapezoidswiththelongsidesontopandtheshortsidesonthebottom.Whenallfourtrapezoidsareconnected,itwillformastructurelikeapyramidwithoutapoint.Tryyourbesttokeepthesurfaceofeachtrapezoidclear!

6. LaunchYouTubeonyoursmartphoneandsearchfor“Hologramvideos,”orusethelinkswehaveprovidedhere:3DHologramVideoHologramElsaHologramT-RexHologramAnimals

7. Afteryouhavemadethevideofullscreen,placethestructure,smallopeningsidedown,inthecenterofyoursmartphoneovertheplayingvideo.Thevideoimagewilldisplayahologramimageinthecenter.

8. Ifyouwouldliketotrythesameprojectonatablet,thetrapezoiddimensionsshouldbeadjustedto2cm(b1)X7(h)cmX12(b2)cm.

STEMExplanation:Hologramsaretypicallythoughtofasonlysciencefiction.Bycreatingapyramidoutofplasticmaterial,thefoursidesreflectanidenticalimagethatcometogetherinsidethepyramid.Inthehologramvideos,fouridenticalimagesarepositionedsymmetricallytoeachother.Whenthepyramidisplacedonthesmartphone,theplastictrapezoidsoneachsidearepositionedtodiffractthelightfromthevideoandtheplasticreflectstheimagesbackontoeachother.Thefourimagescancometogetherandforma3Dopticalillusionthatappearsasitisfloatinginthecenterofthepyramidstructure.CareerConnection:Opticalengineersdesigncomponentsofopticalinstrumentssuchaslenses,microscopes,telescopes,andotherequipmentthatusespropertiesoflight.Theymusthaveknowledgeofthephysicsoflightandhowlightreactstotheoutsideworldandmaterialsinordertocontrol,direct,andmanipulatelighttobehaveinacertainway.Opticalengineerscanworkinresearchorproductdevelopment.Theymaymakeanexistingproductbetterorinventsomethingnew.Opticalengineersmayworkatelectronicscompanies,computermanufacturingcompanies,andmedicalequipmentcompanies.Resource:http://www.instructables.com/id/Homemade-Hologram-Projection/#step5

SmartphoneTrapezoidTemplate: