The questions in the student material are designed to be the basis of a class discussion. They are not designed to be a homework assignment. Your input into the discussion is essential.
Anticipated outcomes for Part 4: Reflection are for students to understand:
the position, size and nature of the image in a plane mirror
real images as produced by a concave mirror
virtual images as produced by a convex mirror
the law of reflection
reflection of parallel rays by concave, convex and plane mirrors
uses of the above aspects of reflection of light in various technological devices.
These outcomes should be illustrated in answers to the questions.
During the discussion, you may find the following questions useful.
A cat stands in front of a plane mirror. What is the position of the image of the cat in a plane mirror in relation to the position of the cat?
Look at a flower in a convex mirror and describe the position, size and nature of the image you can see.
Describe several optical technologies that use concave or convex mirrors.
Examine your nose close-up in a concave mirror and describe the position, size and nature of the image you see.
Describe the difference between concave shapes and convex shapes.
What is meant by the terms incident ray and reflected ray?
What is the difference between a spherical mirror and a parabolic mirror? Which produces the better image?
You might ask the students to write a summary at this stage.
