If the index of refraction of water is 1.33, calculate the speed of light in water. v = m/s

4.43 x 10-8
2.26 x 108
3.99 x 108
1.70 x 108

The correct option is;

2.26 × 10⁸

Explanation:

The index of refraction, in a medium, n = The speed of light in air/(The speed of light in the medium)

The speed of light = 299792458 m/s

Given that the index of refraction of water = 1.33, we have;

1.33 = 299792458/(The speed of light in water)

The speed of light in water = 299792458/1.33 = 225407863.58 m/s ≈ 2.26 × 10⁸ m/s

The speed of light in water ≈ 2.26 × 10⁸ m/s

Therefore;

v ≈ 2.26 × 10⁸ m/s.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.