The Meaning of Reflection is the Change in the Direction of Light Propagation, Along with Examples and Full Explanation

Kapanlagi.com - You must be familiar with the word reflection. Yes, this word is not unfamiliar in Indonesian. However, do KLovers know the meaning of reflection? Yes, the meaning of reflection itself can be a reflection of light to muscle movement in the body.

However, in this article we will discuss the meaning of reflection in light and its types. In addition, KLovers can also find out the types of reflection from the coordinate plane. And this discussion will be explained in general, so that you understand the meaning of the word reflection itself.

For KLovers who are curious about the explanation of the meaning of reflection, here is an explanation of the meaning of reflection along with its types. Let's check it out KLovers.

1. The Meaning of Reflection

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As previously explained, the meaning of reflection is a change in the direction of light propagation. More specifically, the meaning of reflection or reflection is a change in the direction of light propagation towards the original medium side, after hitting the interface of two media.

In addition, according to the Great Indonesian Dictionary (KBBI), reflection is an involuntary movement or reflection in response to something coming from outside. KBBI also defines reflection as a muscle movement (body part) that occurs due to something from outside and outside of consciousness or awareness.

As reported by the old Kemdikbud, the meaning of reflection is also in learning. The meaning of reflection in learning is an activity carried out in the teaching and learning process in the form of written and oral assessments by teachers for students and by students for teachers to express constructive impressions, messages, hopes, and criticisms of the learning process.

2. Law of Reflection

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In fact, reflection also has its own law, KLovers. Yes, in geometric optics, reflection itself has its own law. And here is an explanation of the law of reflection that KLovers can know and understand.

1. The incident ray, the reflected ray, and the normal to the interface are all in the same plane.

2. The angle formed between the incident ray and the reflected ray with respect to the normal is the same as the angle between the reflected ray and the normal.

3. The distance traveled by the incident and reflected rays is reversible.

3. Types of Reflection

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Not only knowing the meaning of reflection, KLovers can also know the types of reflection. Yes, as reported by Wikipedia, there are 3 types of reflection that are explained. Yes, these types of reflection are seen in science. Here are the types of reflection and their explanations.

1. Specular Reflection

The meaning of specular reflection is known in the era of physical optics as the reflection that occurs on a shiny interface which is the cause and effect of the law of reflection. Specular reflection has several models including the Phong and Cook-Torance reflection models.

2. Diffuse Reflection

The meaning of diffuse reflection is the change in the direction of light waves that occurs after hitting a granular interface that is uneven, with scattered light returning to the direction (medium) of origin at many angles of reflection.

3. Complex Junction Reflection

The meaning of complex junction reflection is the reflection that reflects the incident ray back to its original angle, which is caused by a non-linear optical process.

4. Types of Coordinate Plane Reflections

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Then, there is another type of reflection. Yes, in the coordinate field itself, reflection or mirroring is a transformation that moves each point on the plane using the mirror image property of the points to be moved.

In the branch of geometry, reflection of the coordinate plane consists of seven types. And each of these types has its own explanation and formula. Here are some types of reflection in the coordinate plane along with their explanations.

- Reflection about the X-axis

If a point P(x, y) is reflected about the X-axis, then the image of that point can be expressed as P(x, y) becomes P'(x, -y).

- Reflection about the Y-axis

If a point P(x, y) is reflected about the Y-axis, then the image of that point can be expressed as P(x, y) becomes P'(-x, -y).

- Reflection about the origin O(0, 0)

If a point P(x, y) is reflected about the origin O(0, 0), then the image of that point can be expressed as P(x, y) becomes P'(-x, -y).

- Reflection about the line y = x

If a point P(x, y) is reflected about the line y = x, then the image of that point can be expressed as P(x, y) becomes P'(y, x).

- Reflection about the line y = -x

If a point P(x, y) is reflected about the line y = -x, then the image of that point can be expressed as P(x, y) becomes P'(-y, -x).

- Reflection about the line x = k

If a point P(x, y) is reflected about the line with the equation x = k, the image P'(x', y') is obtained. Based on the above figure, there is a relationship where y' = CP' = AP = y <-> y' = y.

OA = x and OB = k

BC = AB = OB - OA = k - x

x' = OB + BC = k + (k - x) = 2k - x

So, if the point P(x, y) is reflected about the line with the equation x = k, the image P'(x', y') is obtained with the rule as P(x, y) becomes P'(2k - x, y).

- Reflection about the line y = b

If a point P(x, y) is reflected about the line with the equation y = b, the image P'(x', y') is obtained. Based on the above figure, there is a relationship where x' = CP' = AP = x <-> x' = x.

OA = y and OB = b

BC = AB = OB - OA = b - y

y' = OB + BC = b + (b - y) = 2b - y

So, if the point P(x, y) is reflected about the line with the equation y = b, the image P'(x', y') is obtained with the rule as P(x, y) becomes P'(x, 2b - y).

Those are some explanations about the meaning of reflection along with its types. Hopefully, the above explanation of reflection can be an additional knowledge for all KLovers.

(kpl/dhm)