The width of the same paper (given in question1) is measured 3 times using a ruler marked with 1mm increments to give values of w= 210 mm, 211 mm, 208 mm for three measurements. What
value should be used for w? for Sw? Express your answer in the form w + Sw. Provide all steps of
your work in the provided box

come closer and become far apart and become steam/gas

attach the statements so i can answer : )

because growing process had stoped after 4-5 year

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.