This, of course, is not likely to happen, since light travels in straight lines. Scientists now know that light passing through space is attracted and curved by the gravitational fields of massive objects in space. Other than these exceptions, though, light does appear to travel in straight lines. This property makes many interesting things take place. The pinhole camera demonstrates this property in an interesting way.
Light shines through a narrow pinhole in the cereal box end.
At the other end, an inverted image appears on wax paper taped over the opening. The drawing below suggests paper an answer. If light travels in straight lines, the light going from spot one on the left can only go to spot one on the right, and so on. The purpose of this activity is to introduce students to a basic property of light and how we use this property in our everyday lives. Punch a hole in the center of the box using the pin.