Anyone help me with these question? my answer is incorrect. 1. Match the spectra

Question

Anyone help me with these question? my answer is incorrect.

1. Match the spectral characteristic with the information that could be obtained about the source of the spectrum.

Presence of certain spectral lines - B. Density

Width of the spectral lines - A. Chemical composition

Maximum of intensity - D. Radial velocity

Doppler shift of all lines - C. Temperature

- E. Size

2.Use table "The Brightest Stars" form Appendix A in the text book(or online resources) to match the following stars. Sirius is D. the nearest from the list.

Acrux is - E. the coldest from the list.

Betelgeuse is - A. the most luminous from the list

Rigil Kentaurus is - B. the hottest from the list.

Rigel is - C. the brightest from the list.

3. The name of a sudden, violent outburst on Sun, often associated with sunspots is solar _______.

Explanation / Answer

a) Presence of certain spectral lines: Chemical composition

The certain chemical or molecule will emit same wavelength

Doppler shift of all lines: Radial velocity

The moving objects will have all the wavelengths doppler shifted

Width of the spectral lines: Temperature

Maximum of intensity: density

b) Please provide the table

c) Solar Flare.

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