Electromagnetic Spectrum and Color Speed of all electromagnetic

Electromagnetic Spectrum and Color

• Speed of all electromagnetic waves is ________ = speed of light • __________ Frequency = __________ Wavelength = High Energy – Gamma Rays • __________ Frequency = __________ Wavelength = Low Energy – Radio Waves

Radio Waves • Wavelengths – ___________________ • Sources – Stars – Transmitters • Uses – – – AM Radio = ____________ Modulation FM Radio = ____________ Modulation Television Cell phones Radar

Microwaves • Wavelengths – ___________ • Sources – Stars – ___________ • Uses – – In microwave ovens _____________________ Radar

Infrared Waves • Wavelengths – _____________ • Sources – Stars – _____________ – Heat Sources • Uses – Night Vision – Thermal Imaging – _____________

Visible Light • Region of the EM spectrum that the _________________________ • All the colors (ROYGBIV - this is order of colors in increasing energy / decreasing wavelength / increasing frequency) • Wavelengths – _____________________ • Sources – Stars – Light Bulbs – Lasers Least Energy Lowest Frequency Longest Wavelength • Uses – Sight – _________________ Greatest Energy Highest Frequency Shortest Wavelength

• Wavelengths Ultraviolet Waves – __________________ • Sources – Stars – ______________ (UVA) – Mercury-Vapor Lamps (UVB and UVC) • Uses – – Sterilization ____________ Forensics Chemical Markers • UVA = tanning, wrinkles • UVB = tanning, sunburn, cancer • UVC = ______________________

X-Rays • Wavelengths – _____________ • Sources – Stars – X-Ray Tubes • Uses – Medical Imaging – _____________ – Astronomy • Can penetrate soft tissue, but not __________

Gamma Rays • Wavelengths – ____________ • Sources – _____________ (radioactive waste from nuclear fission plants releases gamma rays) – Stars • Uses – Cancer radiation treatments

Light and Color • ______________ – Absorbs or reflects all light (can’t see through it) • ______________ – Allows some light to pass through it • ______________ – Allows light to pass through completely

• White light Additive Color – contains all visible colors - ROYGBIV • In white light, an object… – ______________ the color you see – ______________ all other colors • Primary Additive Colors – ________________________ – ____________ • Examples – Computer Monitors (kinda) – Televisions (kinda)

Subtractive Color • Pigments, Dyes, Inks, Paints – colored material that absorbs and reflects different colors • Primary Subtractive Colors – _____________________________ – _______________ • Examples – Color Ink Cartridges