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Explanation:

Turcaich. Tha sia gnèithean de thurcach fiadhaich ann: Turcaich Fiadhaich an Ear (Meleagris gallopavo silvestris) - Tha an raon aca a ’còmhdach leth an ear nan Stàitean Aonaichte; a ’leudachadh cuideachd a-steach gu Ontario, Quebec, agus na Roinnean Mara ann an Canada. Tha iad eadar 5.1 agus 5.3 millean eun.Turcaich. Tha sia gnèithean de thurcach fiadhaich ann: Turcaich Fiadhaich an Ear (Meleagris gallopavo silvestris) - Tha an raon aca a ’còmhdach leth an ear nan Stàitean Aonaichte; a ’leudachadh cuideachd a-steach gu Ontario, Quebec, agus na Roinnean Mara ann an Canada. Tha iad eadar 5.1 agus 5.3 millean eun.

explanation:

the masses of the objects and the distance between them

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.