Astm Lab PDF answers

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TheSunAnswerSheet.pdf

The Sun

Name:______________

Part 1: Spectrum of Hydrogen 1.1 Which photon has greater energy H-alpha or H-beta? Table 1.2 Color Wavelength of light (nm) Emission Type (see below) Red Blue- Green

Violet Dark Violet

Emission Types: H-alpha = electron transition between n=3 and n=2 H-beta = electron transition between n=4 and n=2 H-gamma = electron transition between n=5 and n=2 H-delta = electron transition between n=6 and n=2 Part 2: Other Elements Element Name:_________________

Color of Emission Line Wavelength Element Name:__________________

Color of Emission Line Wavelength

Part 3: Hydrogen Atom and a Loop of Wire

Table 3.1 3.2 Use the wavelength you recorded in Table 1.2 and the equation: (wavelength)x(frequency)=(3x108 m/s) to calculate the frequency of an H-alpha photon. Part 4: Estimate the size of a large sunspot group Part 5: The Sun’s rotation Table 5.1

Sunspot Label

(June 23) Longitude (°)

(June 29) Longitude (°)

June 23 to 29

Change in Longitude

Sunspot Rotation

Rate (°/day)

A B C

Table 5.2

Label Sidereal Rotation Rate of the Sun (°/day)

A B C

Number of nodes in

standing wave

Resonance frequency (Hz)

3 5

(Sun Diameter)= ____x(Earth Diameters)

(Large Sunspot size) = ____ x(Earth Diameters)

5.3 (Rotation Period of the Sun) = _________________ days

5.4 Which of the following is true?

a) The Sun rotates the fastest near the Equator. b) The Sun rotates the slowest near the Equator.

Part 6: Eclipse.mov

6.1 What type of eclipse is it? i) Total Eclipse ii) Annular Eclipse iii) Partial Eclipse

How long does it take for the moon to completely finish the eclipse?

Part 7: Granules

8.1 What is the average size of one granule? You can estimate this by dividing (25,000 km) by the (number of granules across one edge) of the picture.

8.2 What is the average time required for a single granule to form and disappear? You can estimate this by watching a small section of the movie closely and counting how many times granules form and disappear. Divide (35 minutes) by (number of granules that form in 35 minutes).

8.3 Why does each granule have a light center and dark edges?

Part 8: CME.mpg

9.1 Why is the center of the image masked?

9.2 The spacecraft that took this movie is orbiting the Sun. Why do the background stars appear to move?

Part 9: CME animation.mpg

10.1 What protects the Earth from the CME?

  • Part 1: Spectrum of Hydrogen
  • Part 2: Other Elements
    • Part 3: Hydrogen Atom and a Loop of Wire