Refraction and Dispersion (FM Perspective)

What is observed

When light passes from one medium to another, its direction changes.

This is refraction.

At the same time, different frequencies of light propagate at different speeds.

This leads to dispersion, where colors separate.

Standard description

In conventional physics, refraction is described using:

refractive index
wave speed differences between media

Dispersion is explained by:

frequency-dependent interaction with matter

These descriptions are mathematically precise,
but do not always specify a clear physical mechanism.

The FM perspective

In the Field Medium Model, light is a propagating pattern of local reorganization.

In minimally constrained FM, this propagation occurs at the intrinsic rate c.

When light enters a structured medium:

the field is no longer uniform
local reorganization must interact with internal structure

Propagation becomes a coupled process.

Field–structure interaction

In a material, light does not pass unchanged.

Instead, propagation follows a repeating sequence:

field → structure → field → structure → field

At each step:

the incoming reorganization disturbs local structure
the structure reorganizes
this reorganization contributes to the next forward step

This interaction introduces delay.

Origin of reduced speed

The effective speed of light in a medium is lower than c.

In FM, this is not because light “slows down” as an object.

It is because:

part of the local reconfiguration capacity is used to reorganize structure
forward propagation must wait for this interaction to complete

The more interaction required,
the greater the delay.

Refraction as asymmetric delay

Refraction occurs when different parts of a wavefront experience different conditions.

If one side of the wavefront:

interacts more strongly with structure
or requires more reorganization

then:

that side propagates more slowly
the wavefront tilts

This change in orientation produces a new propagation direction.

Dispersion as frequency-dependent demand

Different frequencies require different reconfiguration behavior.

In general:

higher frequencies demand faster local reorganization
lower frequencies demand less

Because of this:

higher frequencies interact more strongly with structure
they use more of the field’s local capacity
they experience greater delay

This leads to:

different effective propagation speeds
separation of colors

Capacity and propagation

Propagation in a medium is limited by the field’s reconfiguration capacity.

Each interaction with structure:

consumes part of this capacity
reduces what remains for forward propagation

The effective speed therefore depends on:

how much reorganization is required
how that demand is distributed locally

Continuity of propagation

Even in a medium, propagation remains continuous.

There is no need for:

particles traveling between atoms
or gaps between interactions

The field remains continuous,
and the reorganization process connects each step.

Summary

In the Field Medium Model:

Light propagation is local reorganization of the field
In structured media, propagation couples to internal structure
This interaction introduces delay and reduces effective speed
Refraction arises from asymmetric reorganization across a wavefront
Dispersion arises from frequency-dependent demand on the field
All propagation remains continuous and local

Final statement

Refraction and dispersion are not changes in how light travels as an object.

They are changes in how reorganization proceeds
when the field must interact with structure along its path.