An Electrical Spark,such as Lightning,generates Electromagnetic Radiation Over a Wide

question 152

Multiple Choice

An electrical spark,such as lightning,generates electromagnetic radiation over a wide range of wavelengths.How much longer will a pulse of radio energy take to travel between two detector stations 100 m apart than will a pulse of ultraviolet radiation from the same spark?

• A) The time will be identical because both pulses travel at the speed of light.
• B) The time will be just a little longer because the high-frequency UV radiation travels faster than the low-frequency radio waves.
• C) The time will be much shorter because long-wavelength radiations travel faster.
• D) The time will be much longer because radio waves have much longer wavelengths and therefore travel more slowly.

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Definitions:

Construct Validity

The extent to which a test or instrument measures the theoretical construct or concept it is intended to measure.

Concurrent Validity

The degree to which the results of a test correlate with the results of an established test measuring the same construct at the same time.

Content Validity

The extent to which a test measures all aspects of the concept or construct it is intended to assess, ensuring the test content is representative of the domain it's supposed to cover.

Construct Validity

The degree to which an assessment or tool accurately quantifies the theoretical idea it aims to evaluate.