Light travels through a liquid at 2.25e8 m/s. What is the index of refraction of the liquid?

Refractive index = 1.33

Explanation:

Refractive index is of a material explains how light passes through a medium. It is the ratio of speed of light in vacuum to the speed of light in the medium.

We know the speed of light in water is and there is a change iñ speed of light in every medium it passes (except when it passes through vacuum). The change in speed of light is known to be =

Given speed of light = 2.25*10^8 m/s

Formula for refractive index:

Where,

change in speed of light, c=

speed of light, v = 2.25*10^8 m/s

= 1.328

= 1.33

The liquid is water, and the index of refraction of water is 1.33

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide