... that as the as the length of the block grows (L), the Lateral displacement grows as well. This is because the glass block drags the ray of light towards the normal. This means that the more that there is that moves it away from the ray that would be there if there were no block, and so the lateral displacement grows as well, so that when the dragging away is doubled, so will the lateral displacement. Because of this, I think my results will be directly proportionate. Measurements, Fair Test and How to be accurate The measurements of the block are 2cm x 6 cm x 11 cm, and I will be using two blocks. The blocks will be put together, so that I can get more than three results. The Sizes of the amount of glass that the ray passes through will be 2cm, 4cm, 6cm, 8 cm, 11 cm, 12 ...

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