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This is a ray drawing activity to aid students in their understanding of how virtual images are formed by plane mirrors, and how the image size and distance from the mirror compare to those of the object.

Type: Lesson Plan

Students practice drawing ray diagrams and then experimentally determine the focal lengths of a concave mirror and a convex lens.

Type: Lesson Plan

• Observe how the eye's muscles change the shape of the lens in accordance with the distance to the object being viewed
• Indicate the parts of the eye that are responsible for vision
• View how images are formed in the eye

Type: Tutorial

• Learn how a concave spherical mirror generates an image
• Observe how the size and position of the image changes with the object distance from the mirror
• Learn the difference between a real image and a virtual image
• Learn some applications of concave mirrors

Type: Tutorial

• Learn how a convex mirror forms the image of an object
• Understand why convex mirrors form small virtual images
• Observe the change in size and position of the image with the change in object's distance from the mirror
• Learn some practical applications of convex mirrors

Type: Tutorial

• Learn to trace the path of propagating light waves using geometrical optics
• Observe the effect of changing parameters such as focal length, object dimensions and position on image properties
• Learn the equations used in determining the size and locations of images formed by thin lenses

Type: Tutorial

The major purpose of this lesson is to promote the learning of eye function by associating eye problems and diseases to parts of the eye that are affected. Included in this module are discussions and activities that teach about eye components and their functions. The main activity is dissecting a cow eye, which in many high schools is part of the anatomy curriculum. This lesson extends the curriculum by discussing eye diseases that students might be familiar with. An added fun part of the lesson is discussion of what various animals see. The most difficult item to obtain for this lesson is the cow eye. Cow eyes from companies cost between $2 – 4 per eye. Some slaughterhouses/butchers will give you cow eyes for free, or charge a minimal fee. If you use cow eyes from these sources, you should store the eyes in a refrigerated area. Other supplies include: scalpel or razor blade, scissors (optional), dissecting pan or cutting board and wax paper, trash bags. This lesson will not fit into a 50-minute period if students are dissecting. If there is no dissection, 50 minutes should be enough time.

Type: Video/Audio/Animation

This virtual manipulative will allow the students to understand how does a lens form an image. Students can see how light rays are refracted by a lens. Students can recognize that the image changes when they adjust the focal length of the lens, move the object, move the lens, or move the screen.
Some of the sample learning goals can be:

• Explain how an image is formed by a converging lens using ray diagrams.
• How changing the lens (radius, index, and diameter) effects where the image appears and ho it looks it terms of magnification, brightness and inversion.

Type: Virtual Manipulative