Consider airflow over a flat plate of length L=1 m under conditions for which transition occurs at Xc = .5 m based on the critical Reynolds number, Rex, c = 5 x 105 .A). Evaluating the thermophysical properties of air at 350K, determine the air velocity. B). In the laminar and turbulant regions, the local convection coefficients are, respectively, hlam (x) = Clam x-.5 and hturb = Cturb x-.2where at, T= 350K, Clam = 8.845 W/m3/2 K, Cturb = 49.75 W/m1.8 K, and x has units of m. Develop an expression for the average convection coefficient, hlam (x), as a function of distance from the leading edge x, for the laminar region, o

a electromagnetic waves

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explanation:

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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.