The electromagnetic spectrum

Nice diagram of whole spectrum.
(Level: student and teacher)
http://praxis.pha.jhu.edu/science/emspec.html The electromagnetic spectrum

Very complete diagram of the spectrum.
(Level: student and teacher)
http://www.noradcorp.com/spectrum.htm The electromagnetic spectrum

Discussion of the different regions, with a diagram showing the structure of the bands.
(Level: student and teacher)
http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html The window in the atmosphere

A diagram of the radio band of the electromagnetic spectrum, showing which parts can get through the atmosphere.
(Level: teacher)
http://www.jpl.nasa.gov/basics/bsf6-3.htm SETI league

The home page of the group that is searching for extraterrestrial intelligence.
(Level: student and teacher)
http://seti1.setileague.org/ Trevor Unsworth

The team in Stockton-on-Tees win a trophy. Includes a photograph of them in front of their dish.
(Level: student and teacher)
http://seti1.setileague.org/press/pres9805.htm 'The alien spotters'

New Scientist article about the SETI league.
(Level: student and teacher)
http://www.nsplus.com/ns/970419/features.html 'What if?'

What if they were sending us messages and we weren't listening?
(Level: student and teacher)
http://seti1.setileague.org/general/whatif.htm The BT Tower

The home page has links to two further pages (see below) which give a tour and key facts about the tower.
(Level: student and teacher)
http://www.vbs.bt.co.uk/bt_bs/bttower.htm The BT Tower - tour

Some nice pictures of the tower, both now and in construction, and some views from it.
(Level: student and teacher)
http://www.vbs.bt.co.uk/bt_bs/btt_tour.htm The BT Tower - key facts

Facts and figures about the tower.
(Level: student and teacher)
http://www.vbs.bt.co.uk/bt_bs/btt_key.htm Goonhilly Down

Information about the transmitter and dishes at Goonhilly.
(Level: student and teacher)
http://www.goonhilly.bt.com/ X-rays

The Science in Focus interactive experiment on ionising radiations lets you have a look at how X-rays and other types of radiation are used in medicine.
(Level: student)
http://schools.channel4.com/science_in_focus/index.html Thermal imaging

A page with thumbnails of some nice thermal images of a variety of subjects. Full-size pictures are available.
(Level: student and teacher)
http://www.ebs-thermography.com/thermo/index.shtml