When a Radio Telescope Observes a Region of Space Between

question 5

Multiple Choice

When a radio telescope observes a region of space between two stars, it detects electromagnetic radiation that has a wavelength of 0.21 m. This radiation was emitted by hydrogen atoms in the gas and dust located in that region. What is the frequency of this radiation?

• A)7.1 × 10¹⁰ Hz
• B)2.1 × 10¹⁴ Hz
• C)3.0 × 10⁸ Hz
• D)6.9 × 10¹¹ Hz
• E)1.4 × 10⁹ Hz

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Definitions:

Nonverbal Messages

Communication that involves transmitting messages without using words, including gestures, body language, facial expressions, and tone of voice.

Albert Mehrabian

A psychologist renowned for his work on non-verbal communication and the 7%-38%-55% rule regarding the elements of effective communication.

Speaker

An individual who delivers a speech or presentation to an audience.

Listener

An individual who actively engages in hearing and processing information that is being communicated by another person or source.