1. Look at the picture of diatoms on page 132. It appears as a color image. Do you think it will look like that when you look at it with the naked eye?
Answer : They are very small, so the red and green would mix when we look at it.
2. Why is the film always inside the camera?
Answer : The main reason the camera is like a small black box is that light that didn't come through the lens won't come in and disturb the image.