The Electromagnetic Spectrum
Essential Questions
- Do we see all wavelengths and frequencies?
- What kind of waves do we NOT see?
- Compared to the whole Electromagnetic Spectrum, how much can our eyes detect? A lot? A little?
- Do we see all wavelengths and frequencies?
- What kind of waves do we NOT see?
- Compared to the whole Electromagnetic Spectrum, how much can our eyes detect? A lot? A little?
Past the darkest red or the deepest purple, the waves of the electromagnetic spectrum fill the space around us.
Essential Questions - What are some uses for these waves? - Are some waves more dangerous than others? - How much of the EM Spectrum do we see? |
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THE ELECTROMAGNETIC SPECTRUM:
Pay attention to which side is high energy/frequency and low energy/frequency.
Some charts show it in increasing order...
...some show it in decreasing order!
Pay attention to which side is high energy/frequency and low energy/frequency.
Some charts show it in increasing order...
...some show it in decreasing order!
What I really like about this diagram is how it gives you the different uses for the waves. It can be a little confusing, since it's turned in a different direction...
Remember: ---RADIO is the longest wavelength. It has low energy. We use them to communicate and . ---MICROWAVES cook our food... but they also carry our text messages! ---INFRARED is the wave that carries the most heat, but we can also use it in our remote controls. ---VISIBLE LIGHT is the smallest part of the spectrum. This is the only one we see. ---ULTRAVIOLET can be found in sunlight. Too much of it can damage our skin. ---X-RAYS pass through soft, less dense things, but get stopped by denser materials. ---GAMMA RAYS have the most energy and are super dangerous. When used the right way, they can kill cancer cells. |
Does radiation from our cell phones hurt us?Short answer: NO.
Here are some things we know about the Electromagnetic Waves we use to communicate! |
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