An adventurous cliff jumper runs horizontally off a cliff. We can ignore air resistance. A grey cliff ledge is shown on the left side of the image with blue water below it and across the bottom of the screen. A brown stick-figure person is running on the cliff towards the right. On the right side is a small grey coordinate axis showing up and right as positive directions.
A grey cliff ledge is shown on the left side of the image with blue water below it and across the bottom of the screen. A brown stick-figure person is running on the cliff towards the right. On the right side is a small grey coordinate axis showing up and right as positive directions.
Which diagram best describes the velocity vectors and trajectory during the person’s fall?

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.

because if the tool that you are using is not balanced it there would be false mass.