Anglų skaidrės. Electromagnetic. radiation. Electromagnetic radiation (EM. Introduction. Spectrum. Gamma ray – its extremely high frequency waves and consists of high-energy photons. Gamma ray. X-ray. X-Rays is a form of electromagnetic radiation. Since Wilhelm Röntgen discovery that X-rays can identify bone structures. Light is an electromagnetic radiation with a wavelength from 400 nm to 100 nm. Ultraviolet. UV radiation is. All electromagnetic radiation. Visible light. Infrared (IR) is invisible radiant energy. Infrared. Infrared is used. Microwaves are a. Microwaves. Microwaves is used in telecommunication Microwave ovens. Radio waves have the longest wavelengths in the electromagnetic spectrum. Radio waves. We have asked people how much do they know about electromagnetic waves. Survey. What kind of electrical waves does cell phones use? What type of waves are used to transmit cellular telephone messages. Questionary. Answers. Electromagnetic waves are very important for us. Conclusion. Thanks for your. attention.
We have asked people how much do they know about electromagnetic waves. We asked 50 people around the neighborhood and made a chart.
What kind of electrical waves does cell phones use?
Microwaves 2. Gamma rays 3. With a thick wall of lead or concrete wall. 4. With Earth magnetic field.