The motion of an electric<span> charge producing a magnetic field is an essential concept in understanding magnetism. The magnetic moment of an atom can be the result of the electron's spin, which is the </span>electron orbital motion<span> and a change in the </span>orbital<span>motion of the electrons caused by an </span>applied<span> magnetic field.</span>
Light's speed only depends on the substance (medium) it's moving through.
It travels at a constant speed as long as it stays in the same medium.
Light has the fastest speed when it's in vacuum, and nothing moves faster than that speed.
Answer:
The diagram shows refraction, and medium 1 is less dense than medium 2.
Explanation:
- Reflection occurs when a light ray hits a surface and bounces back into the same medium
- Refraction occurs when a light ray crosses the interface between two different mediums, changing direction
From the diagram, we clearly see that this is a case of refraction, since the light ray crosses the boundary between two mediums.
The direction of a light ray in refraction is given by Snell's Law:
(1)
where
n1 and n2 are the index of refraction of the two mediums: a higher index of refraction means a higher density for the medium
are the angles of the light ray in medium 1 and medium 2, measured with respect to the normal to the interface
We can rewrite eq. (1) as
From the diagram, we see that
so
and so
which means
so, medium 2 is denser than medium 1, and the correct answer is
The diagram shows refraction, and medium 1 is less dense than medium 2.