1. and the electromagnetic spectrum
The Sun
and the electromagnetic spectrum

2. Transverse wave properties

3. Electromagnetic Waves
Are transverse waves consisting of changing electric fields and changing magnetic fields
Produced when an electric charge vibrates or accelerates
Do not require a medium to travel through – can travel through a vacuum or empty space
Vary in wavelength and frequency

4. The Electromagnetc Spectrum
Introduction to the EMS
Electromagnetic Sun interacting with Comet

5. “Sunlight”
Although the portion of sunlight we can see is visible light there is a spectrum of electromagnetic radiation emitted by the sun that reaches earth.

6. Radio emission from the sun
Radio waves
The longest wavelength of electromagnetic radiation.
Radio emission from the sun

7. Microwaves

8. Infrared radiation from the sun
Infrared radiation is felt as heat and can be detected using infrared cameras and goggles.
Infrared radiation from the sun

9. Image of the sun’s visible light
The largest fraction of electromagnetic radiation from the sun is visible light.
Image of the sun’s visible light

10. UV radiation from the sun
Ultraviolet (UV)
Ultraviolet radiation are the wavelengths that cause sunburn and are the wavelengths absorbed by the ozone layer.
UV radiation from the sun

11. X-rays X-rays are the wavelengths that are used in medical imaging.
This image was taken using X-ray sensitive imaging devices and then converted into this image so that it has the appearance of an optical image.

12. Gamma Radiation
Gamma radiation has medical applications. It is the highest energy, shortest wavelength of EM radiation.

13. Sun and Venus

14. The Sun’s Energy
Fusion – combining two lightweight nuclei (such as hydrogen in the sun) to form heavier nuclei

15. Fission: splitting a heavy atomic nuclei to form 2 lighter atomic nuclei

17. combustion