Light And Colors

The Three Ways Light Interacts With Matter-

Its when an light strikes from of matter. and that interacts matter in three types of ways

First, Transparent-  That allowing light to pass through so that objects behind can be distinctly seen.


Second, Translucent-  That is allowing light, but not detailed images, to pass through; semitransparent.

 

Third, Opaque- That Its not able to be seen through transparent.

How the color of an object is determind?

Human can see different wavelenghts of light as different colors for an example can see long wavelenghts as red and short wavelenghts as violet. Also human can see some colors like Pink and Brown are seen when certain combinations of wavelenght are present. also the colors that an object appears to be  the wavelenght from the object.

Color Addition and Color Subtraction?

Color perception, like sound perception, is a complex subject involving the disciplines of psychology, physiology, biology, chemistry and physics. When you look at an object and perceive a distinct color, you are not necessarily seeing a single frequency of light. Consider for instance that you are looking at a shirt and it appears purple to your eye. In such an instance, there may be several frequencies of light striking your eye with varying degrees of intensity. Yet your eye-brain system interprets the frequencies that strike your eye and the shirt is decoded by your brain as being purple.

The previous lesson focused on the principles of color addition. These principles govern the perceived color resulting from the mixing of different colors of light. Principles of color addition have important applications to color television, color computer monitors and on-stage lighting at the theaters. Each of these applications involves the mixing or addition of colors of light to produce a desired appearance. Our understanding of color perception would not be complete without an understanding of the principles of color subtraction. In this part of Lesson 2, we will learn how materials that have been permeated by specific pigments will selectively absorb specific frequencies of light in order to produce a desired appearance.
 

The 1st and 2nd Commandments

The 1st and 2nd Commandment-

1. I am the Lord thy God; thou shalt not have strange gods before Me.
2. Thou shalt not take the name of the Lord thy God in vain.

Compare And Contrast about the 1st and 2nd Commandment-

Its says much more about the commandments but in the if commandment its means that the lord thy god and that they shalt not have strange gods before me. but it means so much to god because he wants us to say it in proud and honor. the second commamndment means that they shalt not take the name of the lord thy god in vain. like i had said God wants us to say it in proud and honor in different ways to honor his word to him.

Interactions Of Light Waves

Refraction Meaning-
The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different density. The ability of the eye to bend light so that an image is focused on the retina.

Prism Meaning-
an object that has this shape. A prism of glass or a similar transparent material can be used to bend different wavelengths of light by different amounts through refraction. This bending separates a beam of white light into a spectrum of colored light.

These are pictures about how Interaction waves work.

The Law Of Reflection

When a ray of light strikes a plane mirror, the light ray reflects off the mirror. Reflection involves a change in direction of the light ray. The convention used to express the direction of a light ray is to indicate the angle which the light ray makes with a normal line drawn to the surface of the mirror. The angle of incidence is the angle between this normal line and the incident ray; the angle of reflection is the angle between this normal line and the reflected ray. According to the law of reflection, the angle of incidence equals the angle of reflection. These concepts are illustrated in the animation below.

Law Of Reflection

Light is known to behave in a very predictable manner. If a ray of light could be observed approaching and reflecting off of a flat mirror, then the behavior of the light as it reflects would follow a predictable law known as the law of reflection. The diagram below illustrates the law of

reflection.

In the diagram, the ray of light approaching the mirror is known as the incident ray(labeled I in the diagram). The ray of light that leaves the mirror is known as there flected ray (labeled R in the diagram). At the point of incidence where the ray strikes the mirror, a line can be drawn perpendicular to the surface of the mirror. This line is known as a normal line (labeled N in the diagram). The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection. (These two angles are labeled with the Greek letter "theta" accompanied by a subscript; read as "theta-i" for angle of incidence and "theta-r" for angle of reflection.) The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

The Ten Commandments

You shall have no other gods before Me.
You shall not make idols.
You shall not take the name of the LORD your God in vain.
Remember the Sabbath day, to keep it holy.
Honor your father and your mother.
You shall not murder.
You shall not commit adultery.
You shall not steal.
You shall not bear false witness against your neighbor.

You shall not covet.

*Why The Ten Commandments Are Called The Decalogue?

obviously come from the Hebrew Bible, but it is not so obvious to determine exactly what they are or how to count them. These commandments are recorded in two different biblical chapters Exodus 20:1-17 & Deuteronomy 5:6-21, yet each text is slightly different, and neither passage explicitly numbers the commandments one through ten.

* How The Ten Commandments Guide And Norsish The Spirital Well-being Of A Christian Believes?

The Ten Commandments are an excellent piece of literature of the Old Testament, which was given by God Himself, through Moses, to the people of Israel, and which was destined to shape the morals of the society of the world.

The Ten Commandments, also known as the Decalogue, constitute the ethical code by which the human race is guided, on the one hand, to believe in the true God, and, on the other hand to sustain the godly society in the attainment and application of God's will on earth. The Ten Commandments were kept undefiled and handed down to us as a treasure and monument of Christian civilization. The Christian Church has embodied the Ten Commandments as a basic moral code of, discipline toward God and toward men. "There is probably no human document which has exercised a greater influence upon, religion and morals than the Ten Commandments."

Moses is an outstanding personality of the Old Testament; he is known not only for his leadership and statesmanship, but especially as a religious forerunner of Judaism. His destiny was planned by God Himself to lead the people of Israel out of the Egyptian bondage and into the wilderness, a land north of Mt. Sinai and between Egypt and Palestine, their new dwelling place. Moses knew this land well because he had spent 40 years in exile from the Egyptians in this area with a great man, his father-in-law Jethro, who gave counsel to him.

         

Electromagnetic Waves

*How Electromagnetic waves are differ from each other?

When you listen to the radio, watch TV, or cook dinner in a microwave oven, you are using electromagnetic waves.

Radio waves, television waves, and microwaves are all types of electromagnetic waves. They differ from each other in wavelength. Wavelength is the distance between one wave crest to the next.


Waves in the electromagnetic spectrum vary in size from very long radio waves the size of buildings, to very short gamma-rays smaller than the size of the nucleus of an atom.



* Some uses for Radio Waves and Micorwaves?


Radio waves are the lowest-energy, lowest-frequency and longest-wavelength electromagnetic waves. They are produced when an alternating current flows in an aerial and they spread out and travel through the atmosphere. They are not strongly absorbed by the atmosphere. Another aerial is used as a detector and the waves produce an alternating current in it, with a frequency that matches that of the radio waves. Anyone with a receiver can tune it to this frequency to pick up the radio waves so they are suitable for broadcasting (for example, radio and TV programmes) to large numbers of people. An advantage is that this method of communicating does not require wires to transmit information. A disadvantage is that radio stations using similar transmission frequencies sometimes interfere.
A common mistake is to think that we can hear radio waves. We cannot hear any electromagnetic radiation. The radiation is used to carry a signal that is converted into a sound wave by the receiver.
Medium wavelength radio waves are reflected from the ionosphere, a layer of charged particles in the upper atmosphere, so they can be used for long distance communication.

* Examples of how infared waves and visible light are important in our life?

Infrared (IR) is a form of electromagnetic radiation that has a wavelength slightly longer than the color red in the visible light spectrum. Infrared radiation is created when objects are heated at temperatures not quite high enough to make them glow. You can detect infrared radiation by the heating effect it has on your skin. Special sensors are also used to detect IR. This type of radiation is used in electric heaters, greenhouses and night vision sensors

Properties Of Sounds

Sound has a huge impact on our day to day lives. Just think of how much of our technology involves sending or receiving sounds in various forms.

Most people don’t fully understand what sound is.

In this section we will be looking at the basic properties of sound.

Sound is a longitudinal wave.

Remember that longitudinal waves are made up of areas where the wave is compressed together, and other areas where it is expanded.

This would agree with the way that humans themselves make sounds. We force air, sometimes harder, sometimes softer, through our vocal cords.

In the process the air is either squished or allowed to move freely… making the air into a longitudinal wave!

We will look in detail at three fundamental characteristics of sound: speed,frequency, and loudness.

Speed

The speed of sound in air actually depends on the temperature of the air.

As a standard, we will say that the speed of sound is 340m/s at 15°C. If you are not told anything different in a question, use this value.

If you did need to calculate the speed of sound at a different temperature, you could use this formula as a rough estimate (you are not required to memorize this formula)…

v = 331.5m/s + 0.6T

v = velocity of sound (m/s)

T = temperature

These are the properties of sounds that it explains so much of it and how it gives more information about sound waves!