Most Essential Learning Competency
Most Essential Learning Competency
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Explain color and intensity of light in terms of its wave characteristics.
Properties & Characteristics of Light
Light travels in a straight line.
Light travels at a speed of 300, 000 km/s
Light is an electromagnetic wave (it does not require a medium like in mechanical wave)
Light can be reflected, absorbed or transmitted.
From the EM waves, the visible light stands in the middle (so as its characteristics: wavelength and frequency; speed of all EM waves is constant at 300,000,000 meters per second)
Visible light split into colors of red-orange-yellow-green-blue-violet. Beside the red color in the spectrum is the EM wave infrared. On the other side, beside violet in the spectrum is ultraviolet
From red to violet, frequency increases; so as the energy it carries.
This means that the color with highest frequency is color violet, and the color with the lowest frequency is red.
The color violet carries the highest amount of energy, while color red carries the least amount of energy compared to the other 5 colors.
From red to violet, wavelength decreases.
The color with the longest wavelength is red, while violet is the color with the shortest wavelength.
Light can be reflected, absorbed or transmitted.
When light hit an opaque objects, part of the light is reflected and a part of it is absorbed. The light that is reflected appears to be the color of that object that we see, and the color from the visible light that do not reaches our eye is absorbed.
For example, a red rose reflects light waves that have wavelengths in the red part of the visible spectrum.
When all the visible light is absorbed, no color is reflected to our eyes that's why it appears black. On converse, when all the visible light is reflected, the object appears white.
When light hits a transparent material, light is transmitted. As a result, we can see through it like in glass, water and air
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