S2.6.3 For the adult
How we see
How do I see a cup on the table?
What this chapter teaches
We see a thing when light bounces off it and goes into our eyes. Eyes only take light in, so the idea that sight comes out of the eyes is the mistake to watch for.
Three questions to ask
There is no one right wording. Listen for the idea.
- How do you see a cup on a table?
- Why do you see nothing in a room with no light at all?
- How would you draw the rays between a lamp, a cup and your eye?
After the chapter, the learner can
- Say how light lets you see a thing
- Draw rays going into an eye and never out of it
- Explain why you see nothing in total darkness
What they copy into their notebook
We see a thing when light bounces off it into our eyes. Eyes take light in. They send none out. With no light at all, we see nothing.