Light Mirrors and Lenses (3379.0K) - McGraw-Hill Higher Education

A light ray strikes the surface of a plane mirrorand is reflected. Does a relationship existbetween the direction of the incoming light rayand the direction of the reflected light ray?Reflection froma Plane MirrorReal-World QuestionHow does the angle of incidence compare withthe angle of reflection for a plane mirror?Goals■ Measure the angle of incidence and theangle of reflection for a light ray reflectedfrom a plane mirror.Materialsflashlightprotractormetric rulerscissorstapeSafety Precautionssmall plane mirror,at least 10 cm on a sideblack construction papermodeling claywhite unlined paperProcedure1. With the scissors, cut a slit in the constructionpaper and tape it over the flashlight lens.2. Place the mirror at one end of the unlinedpaper. Push the mirror into lumps of clay soit stands vertically, and tilt the mirror so itleans slightly toward the table.3. Measure with the ruler to find the centerof the bottom edge of the mirror, andmark it. Then use the protractor and theruler to draw a line on the paper perpendicularto the mirror from the mark. Labelthis line P.4. Draw lines on the paper from the centermark at angles of 30°, 45°, and 60° to line P.5. Turn on the flashlight and place it so thebeam is along the 60° line. This is the angleof incidence. Measure and record the anglethat the reflected beam makes with line P.This is the angle of reflection. If you cannotsee the reflected beam, slightly increase thetilt of the mirror.6. Repeat step 5 for the 30°, 45°, and P lines.Conclude and ApplyInfer from your results the relationshipbetween the angle of incidence and the angleof reflection.Make a poster that shows your measuredangles of reflection for angles of incidenceof 30°, 45°, and 60°. Write the relationshipbetween the angles of incidence andreflection at the bottom.LAB 561Geoff Butler