OUTCOME
By the end of this lesson you will be able to describe the radio section of the EM spectrum and identify why this is such a valuable tool in examining the universe. you will be able to explain the 21 cm line and its uses in radio astronomy
What radio astronomy is.
The neutral hydrogen line is the key that unlocks our universe. In the hydrogen atom electrons lose energy thus producing the 21 cm wavelength of light.
The space craft Voyager was sent with a message to anyone who found it
LEARNING TASKS
Explain
1. What is radio astronomy?
why is the sky full of radio emissions?
How does the neutral hydrogen emission work?
why is the 21 cm line so valuable to astronomy?
Explore and Elaborate
Radio astronomy is very significant in Australia.examine the CSIRO site
A new, massive project is the SKA, find out what this is.
Evaluate
Qs 43 - 49