You will also have to show how light travels from the other extremes on the object to the eye. After completing steps 2 and 3, you have only shown how light travels from a single extreme on the object to the mirror and finally to the eye. Repeat steps 2 and 3 for all other extremities on the object. The arrowhead should be pointing towards the mirror since light travels from the object to the mirror.Ĥ. Once more, be sure to draw an arrowhead upon the ray to indicate its direction of travel. Thus draw the incident ray from the extreme point to the point of incidence. Since you drew the reflected ray in step 2, the point of incidence has already been determined the point of incidence is merely the point where the line of sight intersects the mirror's surface. But rather than measuring angles, you can merely draw the incident ray from the extreme of the object to the point of incidence on the mirror's surface. The incident ray reflects at the mirror's surface according to the law of reflection. Draw the incident ray for light traveling from the corresponding extreme on the object to the mirror. The arrowhead should be pointing towards the eye since the light is traveling from the mirror to the eye, thus enabling the eye to see the image.ģ. The reflected ray should have an arrowhead upon it to indicate the direction that the light is traveling. It is customary to draw a bold line for the reflected ray (from the mirror to the eye) and a dashed line as an extension of this reflected ray the dashed line extends behind the mirror to the location of the image point. Use the line of sight principle: the eye must sight along a line at the image of the object in order to see the image of the object. Pick one extreme on the image of the object and draw the reflected ray that will travel to the eye as it sights at this point. Note that all distance measurements should be made by measuring along a segment that is perpendicular to the mirror.Ģ. Repeat this process for all extremes on the object until you have determined the complete location and shape of the image. Mark off the same distance on the opposite side of the mirror and mark the image of this extreme point. Pick one extreme on the object and carefully measure the distance from this extreme point to the mirror. Use the principle that the object distance is equal to the image distance to determine the exact location of the object. The four steps of the process for drawing a ray diagram are listed, described and illustrated below.ġ. Thus, we will focus on how light travels from the two extremities of the object arrow (the left and right side) to the mirror and finally to Suzie's right eye as she sights at the image. For simplicity sake, we will suppose that Suzie is viewing the image with her left eye closed. Let's begin with the task of drawing a ray diagram to show how Suzie will be able to see the image of the green object arrow in the diagram below. This section of Lesson 2 details and illustrates the procedure for drawing ray diagrams. In such cases it is customary to draw rays for the extreme positions of such objects.ĭrawing Ray Diagrams - a Step-by-Step Approach Complex objects such as people are often represented by stick figures or arrows. On the diagram, rays (lines with arrows) are drawn for the incident ray and the reflected ray. A ray diagram is a diagram that traces the path that light takes in order for a person to view a point on the image of an object. One useful tool that is frequently used to depict this idea is known as a ray diagram. This process was discussed and explained earlier in this lesson. When sighting along such a line, light from the object reflects off the mirror according to the law of reflection and travels to the person's eye. The line of sight principle suggests that in order to view an image of an object in a mirror, a person must sight along a line at the image of the object.
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