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Reflectionoflight
1 Youcanhaveaviewofyourselfifyoulookintoamirror.calmwatersurface.apieceofshinymetalwall.apieceofwindowglass.????
2 Nowyoulookintoamirrorandseetheimageofyourself.Infrontofthemirror.Onthesurfaceofthemirror.Behindthemirror.
3 Alexsays,‘Yourmirrorimageissmallerthanyourself’.Doyouagree?Yes,theimageisreallysmaller.No,yourimageandyouarealwaysofthesamesize.Itlookssmallerjustbecauseitisfarfromyou.No,itdependsonhowfaryoustandfromthemirror.Others:________.?
Arayoflightbouncesoffaplanemirror.mirrorThisisanexampleofreflectionoflight.1 Lawsofreflection
usefulwordstodescribethereflectionoflightreflectedrayincidentraynormalmirrorangleofincidenceangleofreflection1 Lawsofreflection
LawsofreflectionVideoSimulation
Theincidentray,thereflectedrayandthenormalalllieinthesameplane.normalincidentrayreflectedraymirrornormalincidentrayreflectedraymirror Lawsofreflection
normalincidentrayreflectedraymirrorangleofincidenceangleofreflection= Lawsofreflection
Regularreflectionparallelincidentraysparallelreflectedraysonaflat,smoothsurfacee.g.mirror2 Regularanddiffusereflection
Diffusereflectiononarough,notperfectlysmoothsurfacee.g.coverofabookparallelincidentraysreflectedraysindifferentdirections2 Regularanddiffuse reflection
Q1 Theanglebetweenthe…Theanglebetweentheincidentrayandthe_______iscalledtheangleofincidence.normalThelawsofreflectionstatethatitisequaltotheangleof___________.reflection
Q2 Theanglebetweenan…Theanglebetweenanincidentrayandthemirroris20?.Theanglesofincidenceandreflectionare____?and____?.Themirrorturnstherayby____?.707014020?70?70?
Q3 Trueorfalse:Reflectionof…Trueoffalse:Reflectionoflightbyaroughsurfacedoesnotobeythelawsofreflection.(T/F)
ImagesformedbyaplanemirrorVideo
Raysfrom
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