The answer is geothermal energy. This energy can be harnessed to generate electricity. The energy emanates from the deep core of the earth due to the radioactivity of the rocks in the region. The radioactivity heats Magma from the mantle which subsequently heats the rocks and fluids in the earth crust.
You would have to try on order to hurt yourself. Assuming you did the proper procedures Before and the specimen is fully in sight on the x and y axis and height is the only other thing to look at, then grab the fine adjustment knob ( the smaller coarse adjustment knob), and move it to the desired height. If the specimen starts to get blurry, turn the other way. This is a lot easier if your hand doesn’t move a lot when being held still
Radio Waves • have a short wavelength to transfer to your tv and FM radio
Satellite Signals. • Pass easily through the Atmosphere and clouds used for microwaves,Toasters,Remote Controls