Current Searches for Extraterrestrial Intelligence Use Radio Telescopes at Wavelengths

question 19

Multiple Choice

Current searches for extraterrestrial intelligence use radio telescopes at wavelengths

• A) which must be shorter than the local wavelengths emitted by Earth s atmosphere
• B) which must be longer than the radio wavelength noise naturally emitted by our galaxy
• C) Both conditions a and b above must be fulfilled.
• D) Wrong! Visual light wavelengths are used because they are blocked by dust between the stars.

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Definitions:

Activity Rate

A ratio used in activity-based costing to allocate costs to products or services based on the number of transactions or events.

Processing Activity

The actions or operations conducted on raw materials to transform them into finished goods in the manufacturing process.

Activity-Based Costing

An approach to costing that pinpoints various activities in a company and distributes each activity's costs to every product and service based on their actual consumption.

Machine-Hours

A measure of production time, representing the total hours machines are operated in the manufacturing process.