Observation through out the whole em spectrum
Begin a new document.
Import a detailed diagram of the electro magnetic spectrum. (Use a web search)
Use Wien’s Law to calculate the temperature of the extreme edges of each band. ( If you haven’t got a calculator use the computers or Excel)
λ max x T = 2.898 x 10-3 mK
We cannot observe the whole spectrum from the ground due to absorption by the Earth’s atmosphere.
Insert a diagram of the Atmospheric Window and make relevant notes.
Useful site (http://freespace.virgin.net/gareth.james/index.htm#)
To observe in the microwave, infrared, ultra violet, X and Gamma ray bands we have to use satellites.
Find out about the following missions, what they observed and how useful they were.
The Hubble Space Telescope (http://hubblesite.org/)
IRAS (http://www.nasm.si.edu/nasm/dsh/artifacts/SS-IRAS.htm)
COBE and WMAP, (http://map.gsfc.nasa.gov/ http://aether.lbl.gov/www/projects/cobe/ )
XXM Newton ( http://xmm.vilspa.esa.es/ ) and
Chandra ( http://chandra.harvard.edu/ )
Monday, October 16, 2006
Tuesday, October 10, 2006
Y10 Hw on Meters
H3 Meters
1 (a) Correct diagram showing motor connected
to battery. 1
(b) Correct diagram showing ammeter in series
with motor and battery. 1
(c) ‘+’ sign label on side of ammeter nearest to
long bar of battery symbol. 1
(d) Correct diagram showing voltmeter in parallel
with motor. 1
(e) ‘+’ sign label on side of voltmeter nearest to
long bar of battery symbol. 1
Total 5
2 (a) (i) 1.2V 1
(ii) 1.2V 1
(b) (i) 1.2V 1
(ii) 1.2V 1
(c) (i) 1.2V 1
(ii) 1.2V 1
Total 6
3 (a) (i) 1.5V 1
(ii) 1.5V 1
(b) Electric current. 1
(c) Amps (amperes). 1
(d) (i) 1A 1
(ii) 1A 1
(e) I = Q/t = 5/20 1
= 0.25A 1
(f) Charge/charged particles/current carry
energy with them. 1
F3 Meters
1 (a) 2.6 1
A 1
(b) 3 1
A 1
(c) 3.5 1
A 1
Total 6
2 (a) 0.6A 1
(b) 0.6A 1
Total 2
3 (a) 0.6A 1
(b) 0.6A 1
Total 2
4 (a) 0.3A 1
(b) 0.3A 1
Total 2
5 (a) Correct diagram showing motor connected
to battery. 1
(b) Correct diagram showing ammeter in series
with motor and battery. 1
(c) ‘+’ sign label on side of ammeter nearest to
long bar of battery symbol. 1
(d) Correct diagram showing voltmeter in parallel
with motor. 1
(e) ‘+’ sign label on side of voltmeter nearest to
long bar of battery symbol. 1
Total 5
6 (a) 1.2 1
V 1
(b) 1.2V. 1
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