You’ve been asked to determine whether a new material your company has made is ohmic and, if so, to measure its electrical conductivity. taking a 0.50 mm×1.0 mm×45 mm sample, you wire the ends of the long axis to a power supply and then measure the current for several different potential differences. your data are as follows:
voltage (v) current (a)
0.200 0.47
0.400 1.06
0.600 1.53
0.800 1.97
use an appropriate graph of the data to determine whether the material is ohmic and, if so, its conductivity.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.

uio

explanation: