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$Math Alignment Project - Grand Erie District School First Class Web ...$

D14 Skill Builder ActivityDrawing Ray Diagrams for Concave and Convex MirrorsConcave Mirrors1. Copy Figure 11.23(a) into your notebook.Convex Mirrors1. Copy Figure 11.24(a) into your notebook.concave mirrorconvex mirrorobjectFobjectFFigure 11.23(a) Draw the object and the mirror.2. To determine where the image of the tip of thearrow will be, draw two rays. Draw the first rayparallel to the principal axis until it strikes themirror and reflects through the focal point(Figure 11.23(b)).concave mirrorFigure 11.24(a) Draw the object and mirror.2. Draw the first ray parallel to the principal axis until itstrikes the mirror, where it reflects away in a line thatappears to come from the focal point. Draw adashed line from the point on the mirror where theray strikes through the focal point (Figure 11.24(b)).convex mirrorobjectobjectFFFigure 11.23(b) Draw the first ray.3. Draw the second ray through the focal point untilit strikes the mirror and reflects parallel to theprincipal axis (Figure 11.23(c)).objectFconcave mirrorFigure 11.23(c) Draw the second ray.4. These two rays intersect at only one location. Thisis where the image of the tip of the arrow is. Drawthe inverted image (Figure 11.23(d)).objectimageFconcave mirrorFigure 11.23(d) Draw the inverted real image.5. Repeat the process for other parts of the object.Figure 11.24(b) Draw the first ray.3. Draw the second ray toward the mirror heading for thefocal point until it strikes the mirror and reflects backparallel to the principal axis. Draw a dashed linethrough the mirror parallel to the principal axis until itintersects the first dashed line (Figure 11.24(c)).objectconvex mirrorFigure 11.24(c) Draw the second ray.4. The intersection of both dashed lines represents thevirtual image of the tip of the arrow. The image for aconvex mirror is always virtual, upright, and smaller.objectFconvex mirrorimageFFigure 11.24(d) Draw the upright, virtual image.Ray diagrams model the behaviour of light in mirrors and lenses.429
DIKey ActivityD15 Inquiry ActivityConcave MirrorsQuestionHow does the distance of the object from a concavemirror affect the size and orientation of the image?Materials & Equipment• 2 optical benches• good quality concave mirror with a predeterminedfocal length• light source, such as candle or light bulb• metre stick with millimetres marked• screenCAUTION Light Bulb: Do not shine bright light intoanyone’s eyes. Incandescent light sources can becomevery hot. Do not touch the bulbs or block air flow aroundthe light bulbs.Candle: Tie back long hair, secure loose clothing, andavoid sudden movement when using candles. Make surethe candle is in a secure holder. Be careful not to get thescreen too close to the flame. Be careful when moving thecandle so you are not burned by a drop of melted wax.Dispose of all matches in an appropriate location.Skills References 2, 8ProcedureSKILLS YOU WILL USE■ Gathering, organizing, andrecording relevant data frominquiries■ Processing and synthesizingdata1. Copy Table 11.4 into your notes. Record the focallength of your concave mirror as supplied by yourteacher in the table title.2. Set up the first optical bench with the concavemirror at one end and the light source at the otherend. The concave mirror should be angled slightlyaway from the light.3. Light the candle, or turn on the light bulb. Darkenthe room. Align a second optical bench with ascreen so that the reflected image of the lightstrikes the screen, as shown in the diagram. Itdoes not need to be in focus yet. The opticalbenches are now aligned and should not bemoved (Figure 11.25 on the next page).Table 11.4 Concave Mirror Focal Length: _______Distance of Candle fromMirrorObjectDistance d o(cm)ImageDistance d i(cm)Orientation(uprightor inverted)ObjectHeight h o(cm)ImageHeight h i(cm)Magnification3 times the focal length2 times the focal length1.5 times the focal lengthFocal length0.5 of the focal length430 UNIT D Light and Geometric Optics
Page 1 and 2: 11Ray diagrams model the behaviour
Page 3: 11.1MirrorsHere is a summary of wha
Page 6 and 7: Using the Law of ReflectionThe law
Page 8 and 9: Concave MirrorsA concave mirror, al
Page 10 and 11: Solar OvensA solar oven, also calle
Page 12 and 13: Example Problem 11.3An electron mic
Page 14 and 15: Uses for Convex MirrorsIf you were
Page 18 and 19: D15 Inquiry Activity (continued)Fig
Page 20 and 21: 11.1 CHECK and REFLECTKey Concept R
Page 22 and 23: We use fibre optics systems to tran
Page 24 and 25: A ray of light is electromagnetic r
Page 26 and 27: How Light RefractsYou can picture t
Page 28 and 29: Snell’s LawThe phenomenon of refr
Page 30 and 31: At a certain angle, called the crit
Page 32 and 33: D19 Inquiry ActivityIndex of Refrac
Page 34 and 35: 11.2 CHECK and REFLECTKey Concept R
Page 36 and 37: Night vision goggles use lenses to
Page 38 and 39: Concave LensesA diverging lens is s
Page 40 and 41: Forming a Real ImageConvex lenses a
Page 42 and 43: Keep in mind the following points w
Page 44 and 45: Example Problem 11.11A camera with
Page 46 and 47: D24 Quick LabFocal LengthPurposeTo
Page 48 and 49: D26 Inquiry ActivityIdentifying the
Page 50 and 51: SCIENCEeverywhereSelf-AdjustingGlas
Page 52: 18. A student looks at the letters

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