Electromagnetic spectrum Kyleigh Mitchell

What is the relationship between wavelength and frequency?

The higher the frequency, the shorter the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

Speed=Wavelength+Frequency

Frequency= Speed/Wavelength

Wavelength=Speed/Frequency

Tour of the Electromagnetic Spectrum

Radio Waves: Scientists use radio waves to look at other planets and to talk over radio and listen. These waves are the longest and fill the space around us. They range from 19 cm to longer than the diameter of the Earth.

Microwaves: These waves can pop popcorn, cook your food, and are used in phones, satellites, and GPS. These range from 1 Ghz-40 Ghz and provide a global view. These waves are the backbone of communication and the different rays are L S C X and K.

Infrared Waves: Scientist and others use this to see plants and is most used in cameras. Infrared Waves are reflected and absorbed into Earth and the radiation helps keep the planet warm. Around 760-1,000,000 Nm.

Visible Light Waves: These have shorter wavelengths and higher frequencies that infrared rays. Visible light waves with the longest wavelengths appear red in color, the shortest in violet.

Ultraviolet Waves: Just shorter than visible light, they have higher frequencies, so they can carry more energy. The energy from these waves are strong enough to kill living cells. UVA= closests to visible light UVB=

X-Rays: Usually used in some sort of doctors office, x-rays tell dentists what tooth to look at and surgeons what bone to fix. These rays can be used in many ways, they reveal an objects temperature and detects supernovas many light years away. They range from 3-0.03Nm.

Gamma Rays: These rays are absorbed by Earth's atmosphere from lightning storms and used in many ways, one being to destroy cancer. These are charged particles and deadly to humans. Gamma Rays are very short with a super high frequency which makes them difficult for scientists to detect.

Waves used in the world.

How are waves used in the world to meet our general and societal needs?

All of the waves on the electromagnetic spectrum are used in the world today, a main one used in almost every house today in microwaves. Microwaves are used to cook food quick and easy. They are also used in Phones and GPS. Microwaves are used in many ways and are known as being "the backbone of communication". X-rays are also very important in the world today without them we couldn't see whats wrong with people and what might be going on in their body. People depend on and need these waves in their daily life, they save lives and make them better.

Credits:

Created with images by tookapic - "plasma electricity red" • fodonut - "galaxy space stars" • NASA Hubble - "Veil Nebula Supernova Remnant" • Patrickdennis - "_MG_3424"

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