Light and Radiation

The following websites of the tutorial Understanding Spectra from the Earth 
https://www.seos-project.uni-oldenburg.de/earthspectra/earthspectra-c00-p01.ar.html  
are handled:
•	Introduction: The Blue Planet
•	Light and radiation
- What is light?
- The radiation spectrum 1 to 3
- Elektromagnetic Waves 1 to 4
Please write down your answers to the tasks on paper.
Tasks
1.	The Blue Planet
a.	Which colour phenomena are described in the introductory text "The Blue Planet“of the tutorial Understanding Spectra from the Earth?
b.	Describe three other colourful phenomena on Earth that are visible from a satellite. 
For this purpose, also use the tutorial A world of images, 
https://www.seos-project.uni-oldenburg.de/world-of-images/world-of-images-c00-p00.ar.html 
2.	What is light?
a.	Name three physical quantities used to describe a wave. Create sketches to explain their meaning.
b.	What distinguishes a wave from an oscillation? Are there also commonalities?
c.	What is the wavelength of radio waves with frequency 90.3 MHz?
3.	The radiation spectrum
a.	Mobile phones communicate with the base station in the 900 MHz and 1800 MHz frequency range. Classify this in the spectrum and calculate the wavelength in each case.
b.	Which areas of the spectrum are directly adjacent to the visible light?
c.	Describe the differences between the infrared and ultraviolet images of the Earth. There are four different images in total. Which properties are responsible for these differences? 

4.	Light and radiation
a.	What exactly oscillates in an electromagnetic wave?
b.	What is the relationship between the eiectic and magnetic fields of an electromagnetic wave? 
c.	Compare this with the oscillation of a dipole.
d.	Explain the term 'monochromatic', also with one or two examples.