1. Electromagnetic Spectrum

2. Electromagnetic Spectrum
Electromagnetic Spectrum- Wide range of electromagnetic waves with different frequencies and wavelengths and divided into parts
All waves travel at the same speed in empty space

3. Electromagnetic Spectrum

4. Radio Waves
Radio Waves- Lowest frequency of all electromagnetic waves and carry the least energy
Ex: TV, AM/FM
Antennas vibrate to send or receive radio waves
Microwaves are used to heat food and transmit calls on cell phones
Radar uses electromagnetic waves to detect objects like echolocation

5. Infrared Waves Infrared Waves- Electromagnetic waves that emit heat.
Infrared detectors detect objects that are warmer and cooler than their surroundings
Ex: Pit vipers use infrared to detect prey

6. Visible Light
Visible Light- Electromagnetic waves that you can see with your eyes
Different wavelengths have different colors
Red light (longest wavelength) and blue light (shortest wavelength)
Most objects don’t emit light; they reflect light

7. Ultraviolet Radiation
Has higher frequency than visible light and even shorter wavelengths
Carries more energy and can damage large molecules and kill cells
Ex: Sunburn
Benefits- Vitamin D is able to be produced and disinfect equipment to sterilize
Ozone layer absorbs some of the UV rays

8. X Rays and Gamma Rays
X rays have higher frequency than UV rays and can go through skin and muscle
Gamma rays have highest frequency and carry the most energy
Produced by changes in the nuclei of atoms
X rays and gamma rays can damage and kill cells
Gamma rays are used to kill cancer and bacteria