Answer:
light doesn't need a medium through which to travel because the speed of light is experimentally constant
Seismic wave is the answer
Answer:
A lens placed in a transparent liquid becomes invisible because when refractive index of the material of the lens is equal to the refractive index of the liquid in which lens is placed under this condition no bending of light takes place when it travels from liquid to the lens, so both will start behaving like both are same things.
Explanation:
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I think its E. the control rods are used to control <span>the fission rate of uranium and plutonium. Hope this helps!! </span>
