A wire whose mass per unit length is 10^-3 kg/m is stretched by a load of 4kg over the two bridge os sonometer 1m apart. if it is struck at its middle point, what will be a. wavelength of its subsequent fundamental vibration b. the fundamental frequency of the note emitted if the wire struck at the point near one bridge what further frequency might be heard? ( assume g= 10m/s^2​

the higher the current the higher the mag field around it the higher the influence on the compass

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.