3 Unit 6F: How we see things Unit 6F: VocabularySome useful wordsOpaqueReflectReflectionLight beamMirrorLight travellingA material that light cannot pass throughWhen light ‘bounces’ off a surface in particular shiny surfaces such as mirrorsAn image viewed in a mirror, for exampleA thin column of light such as projected by a torchA shiny surface that reflects lightLight is always movingUnit 6F: How we see things
4 Unit 6F: How does light travel? Unit 6F: How does light travel?: L.O. 1, 2: N.C. 4.3a
5 Unit 6F: How does light travel? Unit 6F: How does light travel?: L.O. 1, 2: N.C. 4.3a
6 Unit 6F: How do we see things? Unit 6F: How do we see things?: L.O. 3: N.C. 4.3d
9 Unit 6F: More reflections When light is reflected it’s direction of travel changesangle i = angle rUnit 6F: More reflections: L.O. 6, 7: N.C. 4.3c
10 Unit 6F: Shiny and dull surfaces You are going to investigate what types of surfaces reflect light the best, shiny or dull.Test each of the surfaces to record whether it reflects a light beam from a torch and whether you can see yourself in the surface or not.Can you draw any conclusions from your results?SurfaceDull or shinyLight reflected from torchI can see my face reflectedMirrorPolished metal sheetSheet of perspexSheet of paperPiece of polished woodShiny painted surfaceDull painted surfaceUnit 6F: Shiny and dull surfaces: L.O. 8, 9: N.C. 4.3c
11 Unit 6F: Shadow Investigation How can we change the size and position of the shadow?Plan how you are going to investigate this?What will you changeUnit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b
12 Unit 6F: Shadow Investigation Shadow Investigation – support slideHow can we change the size and position of the shadow?What happens to the size of the shadow when you move the figure nearer to the light?What happens to the shadow when you move the figure further from the light?Does moving the screen have the same effect?Does moving the light make a difference?Unit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b
13 Unit 6F: Shadow Investigation Shadow Investigation – extension slideMeasure the distance between the figure and the screen and the height to the shadow.Record the results in a tablePlot your results on a line graph of Distance between figure and screen vs. height of shadow.Are there any patterns in the results you have?Distance between figure and screenHeight of shadowUnit 6F: Shadow investigation: L.O. 10, 11, 12, 13: N.C. 4.3b
14 Concept Map How we see things Unit 6F: Summary Travels from a source By mirrorsIn a straight lineObject is seenLightLight enters our eyesReflectionsDirection of a ray can be indicated by an arrowDirection of beam is changedShiny surfaces better than dullHow we see thingsShadowsFormed by opaque objectsObject nearer lightSize can bechangedObject nearer surfaceUnit 6F: Summary: L.O. 14: N.C.
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