The Distinct Blue Color of the Nebulosity Around Stars in Young

question 35

Multiple Choice

The distinct blue color of the nebulosity around stars in young clusters,such as the Pleiades,is caused by

• A) light emitted by very hot gas which has been heated by collisions in the interstellar gas.
• B) preferential scattering of blue starlight by small dust grains in the interstellar material.
• C) atoms of gas emitting light by fluorescence,having been excited by ultraviolet radiation from hot stars.
• D) halos caused by refraction of starlight in ice crystals in the nebula,similar to halos seen occasionally in Earth's atmosphere.

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Definitions:

Perpetual Inventory System

An accounting technique that instantly records the sale or purchase of inventory using computerized point-of-sale systems and enterprise asset management software.

FIFO

"First In, First Out," an inventory valuation method where goods first added to inventory are the first ones to be sold.

Ending Inventory

The worth of items ready for sale at the conclusion of an accounting cycle, determined by adding the initial inventory to acquisitions and subtracting the cost of goods sold.

Perpetual Inventory System

A financial recording approach that instantly logs inventory transactions upon sale or purchase using electronic point-of-sale systems and enterprise resource planning software.