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What are electromagnetic waves?

What are electromagnetic waves?. Are all different types of electromagnetic radiation that transfer energy from one place to another. Electromagnetic waves are transverse waves made up of electric and magnetic fields. magnetic field. electric field.

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What are electromagnetic waves?

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  1. What are electromagnetic waves? Are all different types of electromagnetic radiation that transfer energy from one place to another. Electromagnetic waves are transverse waves made up of electric and magnetic fields. magnetic field electric field All electromagnetic waves travel at the same speed. wave direction

  2. The speed of Light All EM waves travel at the same speed in a vacuum (outer space). C = 3.0 x 108 m/s

  3. Are electromagnetic waves dangerous? radio waves visible light gamma rays microwaves infrared UV X-rays 10m 10cm 1mm 0.01mm 100nm 1nm 0.01nm energy increases hazard increases

  4. The electromagnetic spectrum

  5. What happens when waves hit a surface? When electromagnetic waves hit a surface, they can be reflected, absorbed or transmitted. Behaviour depends on energy and material. Visible light vs X-ray

  6. How does reflection allow us to see? What happens when waves are reflected? A mirror reflects most of the light waves that hit it. The curved satellite dish reflects microwaves from a satellite to the receiver.

  7. Characteristics of electromagnetic waves

  8. Wavelength of electromagnetic waves

  9. Effect of electromagnetic waves

  10. Quiz Different EM waves carry different amounts of energy. Microwaves vs X-rays? • Amount of energy is dependent on the wavelength: • the shorter the wavelength, the ______ its energy. • Wavelength & frequency? the shorter the wavelength, the ______ its frequency. • Frequency & energy • the higher its frequency, the ______ the energy. Do microwaves have a shorter wavelength than X-rays?

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