how is it possible for NASA to establish a signal/connections so far in outer space but we can’t find signals in certain rooms in our homes?
In: Physics
If you take the entire spherical coverage around your wifi router, and concentrated it into a tight beam which was always directed straight at your phone, you could probably make it quite a ways from your house and still receive signals from (note: but not necessarily send to) your router. The fact that the signal strength is being diluted by being omnidirectional is part of it.
Another part of it is how empty space is. It’s a lot easier to transfer electromagnetic signals across (almost) nothing than it is through solid matter, like your home is made of. Specifically certain arrangements of metal are ideal shielding against it. The netting on the door of your microwave oven, for instance, perfectly blocks out the wavelength of electromagnetic radiation that the emitter is using to heat your food.
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