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Blue Skies and Red Sunsets We have previously learned that visible light waves consist of a continuous range of wavelengths or frequencies. When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat.
The light wave could be reflected by the object. And the light wave could be transmitted by the object. Rarely however does just a single frequency of light strike an object. While it does happen, it is more usual that visible light of many frequencies or even all frequencies is incident towards the surface of objects.
When Conclusion reflection occurs, objects have a tendency to selectively absorb, reflect or transmit light certain frequencies.
That is, Conclusion reflection object might reflect green light while absorbing all other frequencies of visible light. Another object might selectively transmit blue light while absorbing all other frequencies of visible light.
The manner in which visible light interacts with an object is dependent upon the frequency of the light and the nature of the atoms of the object. In this section of Lesson 2 we will discuss how and why light of certain frequencies can be selectively absorbed, reflected or transmitted.
Visible Light Absorption Atoms and molecules contain electrons. It is often useful to think of these electrons as being attached to the atoms by springs.
The electrons and their attached springs have a tendency to vibrate at specific frequencies. Similar to a tuning fork or Conclusion reflection a musical instrument, the electrons of atoms have a natural frequency at which they tend to vibrate. When a light wave with that same natural frequency impinges upon an atom, then the electrons of that atom will be set into vibrational motion.
This is merely another example of the resonance principle introduced in Unit 11 of The Physics Classroom Tutorial.
If a light wave of a given frequency strikes a material with electrons having the same vibrational frequencies, then those electrons will absorb the energy of the light wave and transform it into vibrational motion.
During its vibration, the electrons interact with neighboring atoms in such a manner as to convert its vibrational energy into thermal energy. Subsequently, the light wave with that given frequency is absorbed by the object, never again to be released in the form of light.
So the selective absorption of light by a particular material occurs because the selected frequency of the light wave matches the frequency at which electrons in the atoms of that material vibrate. Since different atoms and molecules have different natural frequencies of vibration, they will selectively absorb different frequencies of visible light.
Visible Light Reflection and Transmission Reflection and transmission of light waves occur because the frequencies of the light waves do not match the natural frequencies of vibration of the objects.
When light waves of these frequencies strike an object, the electrons in the atoms of the object begin vibrating.
A reflective close demands reflection from the writer. This conclusion requires the writer to be insightful and to reflect deeply and honestly about the main experience, event, or message of the piece. Quality academic help from professional paper & essay writing service. Best team of research writers makes best orders for students. Bulletproof company that guarantees customer support & lowest prices & money back. Place with timely delivery and free revisions that suit your needs! Visible Light Reflection and Transmission. Reflection and transmission of light waves occur because the frequencies of the light waves do not match the natural frequencies of vibration of the objects.
But instead of vibrating in resonance at a large amplitude, the electrons vibrate for brief periods of time with small amplitudes of vibration; then the energy is reemitted as a light wave. If the object is transparent, then the vibrations of the electrons are passed on to neighboring atoms through the bulk of the material and reemitted on the opposite side of the object.
Such frequencies of light waves are said to be transmitted. If the object is opaque, then the vibrations of the electrons are not passed from atom to atom through the bulk of the material. Such frequencies of light are said to be reflected.
Where Does Color Come From? The color of the objects that we see is largely due to the way those objects interact with light and ultimately reflect or transmit it to our eyes.
The color of an object is not actually within the object itself. Rather, the color is in the light that shines upon it and is ultimately reflected or transmitted to our eyes.
We know that the visible light spectrum consists of a range of frequencies, each of which corresponds to a specific color. When visible light strikes an object and a specific frequency becomes absorbed, that frequency of light will never make it to our eyes. Any visible light that strikes the object and becomes reflected or transmitted to our eyes will contribute to the color appearance of that object.
So the color is not in the object itself, but in the light that strikes the object and ultimately reaches our eye. The only role that the object plays is that it might contain atoms capable of selectively absorbing one or more frequencies of the visible light that shine upon it.Hey Guys, Two very important type of questions you will get is based on conclusions and inferences, Now in an instant moment they will sound very familiar to you.
“By three methods we may learn wisdom: first, by reflection, which is noblest; second, by imitation, which is easiest; and third, by experience, which is the most bitter.” ~ Confucius For me Self-Reflection is the way to remove inner road-blocks, to first become aware of the things that really holding me back and then tackle them by finding a solution.
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Below we offer two examples of thoughtful reflective essays that effectively and substantively capture the author's growth over time at California State University Channel Islands (CI).