The paired questions in each Question Group are different only in terms of which side of the lens that the red arrow object is on. If a student misses a question from a Question Group, the other question will eventually be presented to them. The Concept Builder includes four Question Groups with two questions in each group. Other great resources can be found in the Resources section below that supplement the use of this Concept Builder. We believe that a hands-on lab is an essential pre-cursor to this activity. Our Tutorial pages on the topic are great preparations for this activity. The S is for relative size (smaller, larger, or the same size as the object).
The O is for orientation (upright or inverted). We have come to describe these four characteristics of images using the mnemonic LOST. Finally, they tap on the text field below the lens to identify the type of images as being real or virtual. They can then tap multiple times in that rectangle to toggle through the set of three possible sizes. They do so by tapping in one of the regions or locations outlined by a dashed rectangle that selects the image location and orientation. Students must identify the characteristics of the image. Discerning how the location of the object affects the image characteristics is the topic of this Concept Builder.Įach question in the Concept Builder presents students with a lens, a principal axis, and an object arrow. In the case of converging lenses, the image is sometimes upright and sometimes inverted, sometimes magnified and sometimes reduced in size, sometimes located on the oppositie side of the lens and sometimes on the same side of the lens as the object. And part of that understanding involves understanding how and why the characteristics of the image that they see in a curved mirror or lens depends upon the location of the object. Mirrors and lenses are a student favorite! They are present everywhere and are a source of nearly endless intrigue. A unit on ray optics gives students an ability to understand them and their use.
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