We have been experimenting with lasers and light. On our first day we went outside and we reflected the sun off of mirrors onto the wall. We measured the diameter of the light it made on the wall at different distances. As we moved further away the diameter increased. We also put a pin hole in a piece of card board and let the sun shine through it onto another screen. The further away the pinhole was from the screen the bigger the light relection was. When we went back to the lab we debated on the reasoning for why the light was bigger when the pin hole was futher away, and why why it was smaller when it was closer up. We discussed refraction and diffraction as a part of our reasoning. Refraction is when the light bends, but we decided that this was not part of the solution. Diffraction is when light shines through a hole and its rays disperse in various directions. We knew that this had to be part of the answer. We then drew a diagram which helped make the solution more apparent and easier to discover. The diagram was of a sun, sending rays into a pinhole, and the rays go in straight lines, which ends up making the shadow of the pinhole the same shape as the pinhole, but the further away the screen is from the pinhole, the more space the rays have to spread out, which creates a bigger circle. This is an example of vertical rays, where the measurements of the two opposite angles are equal when they form an hour glass shape (or an X). We also studied the ratios between us and the sun and the moon. We were talking about the rations between the sizes of objects and the distances of the objects from us. So the diameter divided by the distance gave us these ratios.We discoverd that the ratio between the diameter of our pinky finger and the length of our arm and the distance between the diameter of the earth and the diameter of the sun, and the diameter of the moon and the distance between the moon and the earth are all basically the same.