Orbital Configuration Orbital Configuration By: Allison Stickler.
Quiz #1: Orbital Motion, Light & Spectraw.astro.berkeley.edu/~madamkov/astro12/Quiz1.pdf ·...
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Astro/EPS 12 - 2006 Adamkovics Quiz #1: Orbital Motion, Light & Spectra A) 1 Astronomical Unit = 1.5 x 10 8 km, Calculate the orbital velocity of the Earth (in km/s) (5 points) B) State four different regions of the electromagnetic spectrum in order of increasing wavelength and give an approximate wavelength (within a factor of 10) for any one of them. (5 points) C) State (at least) five facts that you know about: the information in the spectrum below and/or what is implied about the source of radiation. (1 Point per unique and correct answer up to a maximum of 5 points)
Transcript of Quiz #1: Orbital Motion, Light & Spectraw.astro.berkeley.edu/~madamkov/astro12/Quiz1.pdf ·...
Astro/EPS 12 - 2006 Adamkovics
Quiz #1: Orbital Motion, Light & Spectra
A) 1 Astronomical Unit = 1.5 x 108 km,
Calculate the orbital velocity of the Earth (in km/s) (5 points)
B) State four different regions of the electromagnetic spectrum in
order of increasing wavelength and give an approximate
wavelength (within a factor of 10) for any one of them. (5 points)
C) State (at least) five facts that you know about: the information in
the spectrum below and/or what is implied about the source of
radiation. (1 Point per unique and correct answer up to a maximum of 5 points)
Astro/EPS 12 - 2006 Adamkovics
Solution 1A: Orbital Motion
1 Astronomical Unit = 1.5 x 108 km,
Calculate the orbital velocity of the Earth (in km/s) (5 points)
SunEarth
1 AU = 1.5 x 108 km
circumference
period
To calculate a velocity, determine the distance traveled over a period of time. In this
case the distance traveled is the circumference of Earth’s orbit and the period is the
time to complete an orbit -- one year.
distance
time
2 x ! x 1.5x108 km
1 year
9.4 x 108 km
3.1 x 107 sec
9.4 x 108 km
1 year x (365 day) x (24 hr) x (3600 sec)
(1 year) (1 day) (1 hr)
===
=
velocity =
= 30 km/s
In other words, multiply the radius by 2! and convert years
to seconds. Think about how you would apply this to other
planets.
Astro/EPS 12 - 2006 Adamkovics
Solution 1B: Electromagnetic RadiationState 4 regions of the electromagnetic spectrum in order of
increasing wavelength and give an approximate wavelength (within
a factor of 10) for any one of them.(5 points total)
Astro/EPS 12 - 2006 Adamkovics
Solution #1C: Light & Spectra
State (at least) five facts that you know about the information in the
spectrum below and/or what is implied about the source of radiation.(1 Point per unique and correct answer up to a maximum of 5)
1. Emission spectrum (not continuum or absorption)
2. Transitions from higher energy levels to lower energy levels
3. Visible region of electromagnetic radiation
4. Atomic (not molecular) emission -- few lines.
5. Hot (or excited) gas at low density (not solid or liquid)
6. Multiple transitions in spectrum, blue lines indicate higher energy
than red.
7. Not a sodium spectrum -- because sodium is two yellow lines
8. Having memorized everything in the book, it’s the spectrum of
Helium.
Some possible answers:
