Type II Supernovae Show Prominent Lines of Hydrogen in Their

question 179

Multiple Choice

Type II supernovae show prominent lines of hydrogen in their spectra, whereas hydrogen lines are absent in spectra of Type Ia supernovae. Explain. (Hint: Think about the type of star that gives rise to each of the two types of supernova.)

• A) Massive stars contain large amounts of hydrogen, whereas white dwarfs are mostly carbon and oxygen.
• B) White dwarfs have a thick surface layer of hydrogen, whereas neutron stars contain no hydrogen at all.
• C) Massive stars have fused all their hydrogen into heavier elements, whereas low-mass stars still have large hydrogen-rich envelopes.
• D) Massive stars contain large amounts of hydrogen, whereas neutron stars contain no hydrogen at all.

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Definitions:

Movement Along

Describes the change in quantity demanded or supplied of a good in response to a change in price, as shown on a graph.

Demand Curve

Graphical representation showing how the quantity demanded of a commodity varies with changes in its price.

Inferior Good

A type of good for which demand decreases when consumer income rises, unlike normal goods where demand increases with rising income.

Chili Peppers

Fruit of plants from the genus Capsicum, used worldwide as a spice or vegetable, known for their hot and spicy flavor.