The Electromagnetic Spectrum

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Presentation transcript:

The Electromagnetic Spectrum

Electromagnetic Spectrum Definition: It is a range of all types of electromagnetic radiation Nickname: EMS

But what is radiation? Radiation is: Energy that travels throughout space (even around us) Video

Wavelength Electromagnetic Radiation can have different wavelengths Wavelengths tell us what type of radiation (energy) it is Short wavelengths have the most energy, and as the wave length get longer, the energy decreases

Wavelength Short wavelengths Lots of energy Examples: Gamma rays and x-rays Long Wavelengths Less energy Examples: Radio and Microwaves

Wavelengths Light waves provide us with visible light Visible light is colors that we can see

Electromagnetic Spectrum and Space The electromagnetic spectrum (EMS) helps scientists study far away places in the universe and their movement in relation to the Earth

Electromagnetic Spectrum and Space Most stars emit light rays (visible light) which allows us to measure light years Radio waves help us explore space (radio telescope)

Electromagnetic Spectrum and Space Microwaves help us determine how far away galaxies are. Cosmic Microwave Radiation found in the universe helps support the Big Bang Theory

Electromagnetic Spectrum and Space EMS also helps us identify what elements stars are made of Each element on the periodic table absorbs light at different wavelengths creating a “fingerprint” on the EMS Black lines show us the fingerprint Example of a “fingerprint” for Hydrogen