PS 102 AN INTRODUCTION TO LIGHT Ch 12+

PS 102 AN INTRODUCTION TO LIGHT Ch 12+ - AN INTRODUCTION TO...

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AN INTRODUCTION TO LIGHT (Ch 12+) ELECTROMAGNETIC RADIATION – we are bombarded by all types of radiation every day. Our bodies can only detect a few of these types of radiation. We can detect infrared radiation (heat). We see the after-effects of ultraviolet radiation (sunburn!) But mostly, we constantly are able to detect LIGHT. Our eyes and brain are wired to receive and interpret the various wavelengths of the electromagnetic spectrum in the range known as “light”. LIGHT has wavelengths in the 10 -7 meters range. Red light has a wavelength of about 4 x 10 -7 m and violet light has a wavelength of about 4 x 10 -7 m. The range of light frequencies is approximately 10 15 Hertz. Light is actually only a very small “piece” of the entire electromagnetic spectrum of radiation energy in our universe. VELOCITY – it is interesting to know that, regardless of the type or range of the electromagnetic radiation, all types travel at 3.0 x 10 8 m/s, or about 186,000 miles/s. in a vacuum.
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This note was uploaded on 04/18/2008 for the course PHYS 102 taught by Professor Scott during the Fall '07 term at Fort Hays.

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PS 102 AN INTRODUCTION TO LIGHT Ch 12+ - AN INTRODUCTION TO...

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