By KM
Published Jun 19
6 cards
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2.6.0 In our explanations of parallel universes we have the idea of tangible universe and shadow universes. What exactly differentiates them?
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2.5.0 Imagine an opaque barrier that has two straight, parallel slits which are separated by 0.2 millimetres apart:
If we shed light through the slights we get unusual shadows, but they just verify our past conclusion (that light โrebelsโ when constrained to small sizes):
Now, what sort of shadow is cast if we cut a second, identical pair of slits in the barrier, interleaved with the existing pair, so that we have four slits at intervals of one-tenth of a millimetre? โ page 40
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2.4.0 Our next two questions are directly taken from the book. Consider this picture:
is there, in principle, any limit on how sharp a shadow can be (in other words, on how narrow a penumbra can be)? For instance, if the torch were made of perfectly black (non-reflecting) material, and if one were to use smaller and smaller filaments, could one then make the penumbra narrower and narrower, without limit? โ page 36
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2.3.0 What is the quantization property?
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2.2.0 Letโs imagine there is someone 10km away from you โ weโll call him Bob. If you were to turn on the flashlight, is there a distance from which Bob would entirely lose sight of light?
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2.1.0 Imagine an infinite empty room with no light. What would you see if you turned on a flashlight in your hand?
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