a. would be able to read a stop sign from 12 miles away
b.
c. some of the light has been traveling through space for 10 billion years
d. has 4 pairs of mirrors
Monday, September 29, 2008
Monday, September 22, 2008
stellar spectra
1.fusion
2.closer so you can tell when their positions change
3. brightness of the star
4.emission, when something is given off and absorption is when something is absorbed
5.magnitude is how bright the star actually is, and intensity is how bright you see it
2.closer so you can tell when their positions change
3. brightness of the star
4.emission, when something is given off and absorption is when something is absorbed
5.magnitude is how bright the star actually is, and intensity is how bright you see it
escaping the sun
A. # of layers interactions
5 24
10 157
15 174
20 479
25 947
As the number of layers increased so did the number of interactions
B. # of layers interactions
5 31
10 106
15 233
20 433
25 706
the data is about the same. The data is more accurate because there were more photons and it took the average number of interactions
C. ev nm photons sent photons detected
1.5 828 15 14
1.8 690 15 8
2.0 621 15 13
2.3 540 15 11
2.5 497 15 11
the wavelength goes down. the number of photons detected also goes down
D. ev nm gas atoms photons sent photons detected
2.2 565 O 15 14
2.2 565 Mg 15 13
2.2 565 Na 15 9
2.2 565 Ca 15 13
2.2 565 H 15 11
it didn't have much of an effect on the number of photons detected
5 24
10 157
15 174
20 479
25 947
As the number of layers increased so did the number of interactions
B. # of layers interactions
5 31
10 106
15 233
20 433
25 706
the data is about the same. The data is more accurate because there were more photons and it took the average number of interactions
C. ev nm photons sent photons detected
1.5 828 15 14
1.8 690 15 8
2.0 621 15 13
2.3 540 15 11
2.5 497 15 11
the wavelength goes down. the number of photons detected also goes down
D. ev nm gas atoms photons sent photons detected
2.2 565 O 15 14
2.2 565 Mg 15 13
2.2 565 Na 15 9
2.2 565 Ca 15 13
2.2 565 H 15 11
it didn't have much of an effect on the number of photons detected
Thursday, September 11, 2008
elecromagnetic radiation
X rays and MRI's are very important to us today. They help athletes determine the seriousness of their injuries and help them find out what is broken or torn.
Mercury
a. rotates 3 times in the planets 2 years
b. radio waves went out, they got bigger so only a small part came back
c. showed the planet was in rotation
b. radio waves went out, they got bigger so only a small part came back
c. showed the planet was in rotation
Wednesday, September 10, 2008
tunguska
i think it was a nuclear blast
1. It wasn't a meteor because theres no crator
2. the trees are broken like a nuclear blast
3. there was radiation in the area after the blast
1. It wasn't a meteor because theres no crator
2. the trees are broken like a nuclear blast
3. there was radiation in the area after the blast
Wednesday, September 3, 2008
earth
-Rotates at 1600 km/hr
-Rotates around it's axis every 24 hrs
-Goes around the sun at 190,000 km/hr
-Takes 365.25 days to go around the sun
- Leap year every 4 years
Tuesday, September 2, 2008
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