Physical Science - Wave Properties of Light.pdf

Physical Science - Wave Properties of Light

1. BEHAVIOR OF
ELECTRONS AND
WAVE PROPERTIES
OF
LIGHT

2. OBJECTIVES
Attheendofthispresentation,youare
expectedto:
1.citeexperimentalevidenceshowingthat
electronscanbehavelikewaves(S11/12PS-IVg-
64);
2.enumeratethewavepropertiesoflight;and
3.differentiatedispersion, scattering,
interference,anddiffraction(S11/12PSIVh-65)

3. 01
Evidences of Wave-Like
Behavior of Electrons

4. 4

5. 5

6. 6

7. 7

8. 8

9. 9

10. Is
ELECTRON
a PARTICLE
or a WAVE?

11. Two famous scientists in the 1600s,
Christiaan Huygens and Isaac Newton
were both working on the theories for the
behavior of light.

12. Light is a
wave.
Light is made up
of corpuscles
(particles).

13. Light is a wave
as shown in my
double-slit
experiment.
Thomas Young

14. Constructive interference vs. Destructive interference

16. Constructive interference vs. Destructive interference

17. Light is made up
of particles.
Behold! The
wave-particle
behavior of light.
Einstein
Photoelectric Effect

18. After the wave-
particle dual behavior
of electron in light was
accepted, another
scientist took a leap
by testing the
hypothesis in MATTER.

19. LET’S REVIEW!
What is MATTER?
Why MATTER
matters?
What are the parts
of an ATOM?

20. Electrons act
both as
particles and
waves.
Modern Double-Slit
Experiment

22. Modern
Double-Slit
Experiment

23. LET’S PONDER!
Relate yourself about the dual nature of both
light and electrons (behave like particles and
waves). Was there an instance in your life that
you behave like a particle (making an impact
to other lives) and a wave (being interfered but
not disturbed)?
Perform in a creative way (talk show, drama,
flash news report, etc.).

24. RUBRICS FOR SCORING
10 8 6 4 2
Creativity
The group
performed an
outstanding
performance
showing creativity.
The group
performed a
satisfactory
performance
showing creativity.
The group
performed a good
performance
showing creativity.
The group
performed a fair
performance
showing creativity.
The group
performed a poor
performance
showing creativity.
Unity
Unity and
understanding is
consistently
present throughout
the performance.
Unity and
understanding is
mostly present
throughout the
performance.
Unity and
understanding is
present but a
member did not
participate.
Unity and
understanding is
mostly present
throughout the
performance.
Unity and
understanding is
poor throughout
the performance.
Concept
The concept of the
performance is
outstanding.
The concept of the
performance is
satisfactory.
The concept of the
performance is
good.
The concept of the
performance is
fair.
The concept of the
performance is
poor.
Confidence
Everyone in the
group shows
excellent
confidence.
Most of the group
shows excellent
confidence.
Half of the group
shows excellent
confidence.
Less than half of
the group shows
excellent
confidence.
None of the group
shows excellent
confidence.

25. 02
Wave Properties of
Light

26. PROPERTIES OF LIGHT
There are 7 basic properties of light:
1.Reflectionof light
2.Refractionof light
3.Diffractionof light
4.Interferenceof light
5.Polarizationof light
6.Dispersionof light
7.Scatteringof light

27. What property of light is shown in the pictures?
Reflectionof light
Refractionof light
Diffractionof light
Interferenceof light
Polarizationof light
Dispersionof light
Scatteringof light
1
2
3
4
5
6
7

28. What property of light is shown in the pictures?
3 Reflectionof light
7 Refractionof light
4 Diffractionof light
5 Interferenceof light
2 Polarizationof light
6 Dispersionof light
1 Scatteringof light
1
2
3
4
5
6
7

29. Dispersion
Interference Diffraction
Wave Properties of Light
Scattering

30. Theseparationofvisiblelightintoitsdifferentcolors
(ROYGBIV)isknownasdispersion.
Dispersion

31. Theseparationofvisiblelightintoitsdifferentcolors
(ROYGBIV)isknownasdispersion.
Dispersion

32. Diffractionisthebendingoflightaroundcornerssuchthat
itspreadsoutandilluminatesareaswhereashadowis
expected.
Diffraction

33. Diffractionisthebendingoflightaroundcornerssuchthat
itspreadsoutandilluminatesareaswhereashadowis
expected.
Diffraction

34. Interferenceoflightisthephenomena ofmultiplelight
wavesinterferingwithoneanotherundercertain
circumstances,causingthecombinedamplitudesofthe
wavestoeitherincreaseordecrease.
Interference

35. Interferenceoflightisthephenomena ofmultiplelight
wavesinterferingwithoneanotherundercertain
circumstances,causingthecombinedamplitudesofthe
wavestoeitherincreaseordecrease.
Interference

36. Interference
Constructive Interference
Destructive Interference

37. Interference
Constructive Interference
Thisresultswhenthewavesarrivetogetheratapointin
phase,thatis,cresttocrestortroughtotrough.Theresult
isareinforcedwaveofamplitudeequaltothesumofthe
amplitudesofthetwowaves.

38. Interference
Destructive Interference
Thisresultswhenthewavesarrivetogetheratapoint180
0
outofphase,thatiscresttotrough.Theresultantwaveis
ofalesseramplitudeequaltothedifferenceofthe
amplitudesoftheindividualwaves.

39. Interferenceoflightisthephenomena ofmultiplelight
wavesinterferingwithoneanotherundercertain
circumstances,causingthecombinedamplitudesofthe
wavestoeitherincreaseordecrease.
Interference

40. Scatteringistheprocessinwhichairmoleculesabsorb
sunlightandreemitinvariousdirections.
Scattering

41. “Know what sparks the light in
you. Then use that light to
illuminate the world.”

42. Various
LIGHT
Phenomena

43. The world is such a mysterious place to live. I came to be resounded with its
glorious whispers and giggles. Applaud to its wondrous works as I walk
slowly with doubts in my mind.

44. Whyisourreflectionontheconcaveandconvexsidesofa
spoonlooksdifferent?
Howmiragesareformed?
Whydoeslightfromaredlaserpassesmoreeasilythough
redcellophanethangreencellophane?
Whydoesclothingofcertaincolorsappeardifferentin
artificiallightandinsunlight?
Whatarehaloes,sundogs,primaryrainbows,secondary
rainbows,andsupernumerarybowsandhowarethey
formed?
Whycloudsareusuallywhiteandraincloudsdark?
Whytheskyisblueandsunsetsarereddish?
S11/12PS-IVh-66

45. Whyisourreflectionontheconcaveandconvexsidesofa
spoonlooksdifferent?
Theshinyspoonislikeaminimirror,butwithacurvein
it.ThefrontofthespoonisaCONCAVE surface,andthe
backisaCONVEXsurface.

46. Amirageisanopticalphenomenon thatcreatesthe
illusionofwaterandresultsfromtherefraction
(bending)oflightthroughanon-uniformmedium.
Miragesaremostcommonlyobservedonsunnydayswhen
drivingdownaroadway.
Howmiragesareformed?

47. Greencellophanewillonlyallowgreenlighttopassthroughit.
Thecellophaneabsorbsothercolorsoflight.Forexample,greenlight
willnotpassthroughredcellophane.Thegreenlightisabsorbedby
theredcellophane.However,greenlightwillpassthroughgreen
cellophane.Asageneralruleeachcolorfilter(e.g.glassorcellophane)
willonlyallowlightofitsowncolortopassthrough.
Whydoeslightfromaredlaserpassesmoreeasilythough
redcellophanethangreencellophane?

48. Ahaloisaringoflightsurroundingthesunormoon.Mosthalos
appearasbrightwhiteringsbutinsomeinstances,thedispersionof
lightasitpassesthroughicecrystalsfoundinupperlevelcirrus
cloudscancauseahalotohavecolor.
Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

49. Sundogs,alsoknownasmocksunsor"parhelia",areapairof
brightlycoloredspots,oneoneithersideofthesun.
Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

50. Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

51. Rainbowsresultfromrefractionofsunlightinfallingwaterdroplets
plusreflectionofthelightfromthebackofthedroplet.
Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

52. Asthedropletsgetsmaller,redweakens.Infinemist,allcolors
exceptvioletmaydisappear.
Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

53. Thesecondaryrainbowisabout10°furtheroutfromtheantisolar
pointthantheprimarybow,isabouttwiceaswide,andhasitscolors
reversed.
Whatarehaloes,sundogs,primaryrainbows,secondaryrainbows,and
supernumerarybowsandhowaretheyformed?

54. Whycloudsareusuallywhiteandraincloudsdark?
Raincloudsscattersmoresunlightbecausetheyhave
biggerwaterdroplets.Thismeansthatlesslightfrom
theSunreachesthebottomofthecloud,givingagray
appearance.

55. Whytheskyisblueandsunsetsarereddish?

56. Whytheskyisblueandsunsetsarereddish?
Whenincomingsunlightencountersaheavyconcentrationof
particlesintheatmosphere,theshorterwavelengthsoflight(violet
andblue)arescatteredaway,resultinginaredsunset.Redsunsets
areoftenobservedfromabeachbecauseofthehighconcentration
ofsaltparticlessuspendedintheairovertheoceans.Theseparticles
effectivelyscattershorterwavelengthsoflight,producing red sunsets.

57. FORMATIVE ASSESSMENT

58. 1.Thebluecoloroftheskyisdueto:
A.selectivescatteringofvisiblelightbyair
molecules.
B.thefilteringeffectofwatervaporinthe
earth'satmosphere.
C.reflectionofsunlightofftheearth's
oceans.
D.transmissionofvisiblelightthroughthe
ozonelayerintheearth's
stratosphere.

59. 2.Blueskiesoccurduringthedaydue
to:
A.Diffraction
B.Miescattering
C.Rayleighscattering
D.TyndallEffect

60. 3.Thefollowingcorrectlyexplainslightpassing
throughacellophaneexcept:
A.Aswhitelightpassesthroughredcellophane,the
cellophaneabsorbsallcolorsexceptred.
B.Greenlightcan’teasilypassthroughgreen
cellophanebecauseitshowsthesamecolor.
C.Aredlightpassingthroughredcellophanewill
simplygothroughsincetheyhavethesamecolor.
D.Redlightcan’teasilypassthroughgreen
cellophanesincethecellophaneabsorbsthered
light.

61. 4.Thissideofthespoongivesyouan
invertedreflectedimage.
A.Concave
B.Convex
C.Mirage
D.Halo

62. 5.Whatcausesamirage?
A.scatteringoflightbyairmolecules.
B.thebendingoflightbyairofdifferent
densities.
C.athinlayerofmoistairnearthe
ground.
D.reflectionoflightfromahotsurface.