Experimental observations have shown X-rays. Travel in vaccum with a speed `3xx10^8` .

Experimental observations have shown that X-rays travel in vacuum with a speed of 3 xx 10^8 m s^(-1) . What conclusion can be drawn about the nature of X-rays from this observation?

Experimental observations have shown that X-rays exhibit the phenomenon of diffraction and can be polarised.What conclusion can be drawn about the nature of X-rays from this observation?

Electromgnetic waves travel in a medium with a speed of 2 xx 10^8 m s^(-1) .The relative permeability of the medium is 1.Find the relative permittiity.

During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station ? The signal travels at a speed of light that is 3 xx 10^8 ms^-1 .

Galileo's experminet showed that if the two objects of unequal masses are dropped from the sme height in vaccum,the times required by tehm are equal to reach the ground.But,if they are shown vertically upwards in vaccum with the same initial velocity what is the ratio of the times required to reach the ground?

Find: 36.8xx10