Spectral Classification of a Star into the Lettered Categories, O

question 213

Multiple Choice

Spectral classification of a star into the lettered categories, O, B, A, F, G, K, and M is carried out by

• A) finding the wavelength of peak emission in the continuum spectrum of the star.
• B) determining the relative mass of the star by the study of binary star motions, in order to place it into its proper mass classification.
• C) determining the total energy emitted at all wavelengths by the star, taking account of the full spread of wavelengths and their distances, in order to place the star into its luminosity class.
• D) examining the relative amounts of absorption caused by various neutral and ionized atoms in a stellar spectrum.

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Definitions:

Workers

Individuals engaged in doing a job or work, typically in exchange for payment or salary.

Absenteeism

The habitual non-presence of an employee at their job, which can be a significant issue for employers in terms of productivity and efficiency.

Older Employees

Individuals in the workforce who are typically beyond the average age of retirement, often possessing extensive experience and knowledge.