Why is it important for Americans today to discuss the topic of slavery?

Have you learned anything new from your research? Why/why not? American History 200-300 words ASAP Please? Light that we experience everyday is a form of energy, or radiant energy. Light that is visible to the human eye is an example of electromagnetic radiation, EMR. EMR is a fundamental phenomenon of electromagnetism and behaves sometimes as propagating waves and at other times as very fast moving particles called photons. The waves and photons travel through space carrying energy away from a light source at a very fast speed called the speed of light. For all forms of EMR, this speed is a constant and has the value m s-1. For both waves and photons, the speed of light is related to the wavelength ? and the frequency f of the EMR by

.

There are no upper or lower limits on the wavelength or frequency. The wavelength can range from a very tiny fraction of a meter to kilometers or longer. The energy of an individual photon is proportional to its frequency E ยต f so the photons or waves with shorter wavelengths have more energy than photons or waves with longer wavelengths. In modern Astronomy, observations of celestial objects may be made at all wavelengths of the electromagnetic spectrum, not just the visible (optical) wavelengths.

1. Arrange the following list in order of increasing wavelength (and decreasing frequency): visible light, radio waves, ultraviolet, gamma rays, microwaves, infrared, and X rays.

1 (shortest wavelength)

2

3

4

5

6

7 (longest wavelength)

2. Arrange the same list in order of increasing photon energy, from lowest photon energy to highest energy.

1 (lowest energy)

2

3

4

5

6

7 (highest energy)

White light is made up of all the colors of the rainbow. Different colors correspond to different wavelengths. Visible light can be split into its rainbow of constituent colors using a spectrometer. A spectrometer can be a simple glass prism or diffraction grating, or on a large research telescope, a sophisticated electronic device which resolves wavelengths with very high precision.

3. In the table below arrange the following colors in order of decreasing wavelength, from longest to shortest wavelength: orange, violet, yellow, blue, green, and red.

4. Using the internet or other resources, also add the minimum and maximum wavelength for each color band to the table below.

Color

Minimum ? [nm]

Maximum ? [nm]

Longest Wavelength

Shortest Wavelength

  
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