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Question 34

An astronomical observatory detects two distinct cosmic electromagnetic signals from a distant nebula:

Signal X consists of photons each with an energy of 8.2 × 10-19 J. Signal Y has a wavelength of 2.5 cm in a vacuum.

Identify the regions of the electromagnetic spectrum to which Signal X and Signal Y belong.

A

Signal X: Visible light; Signal Y: Radio waves

B

Signal X: X-rays; Signal Y: Microwaves

C

Signal X: Ultraviolet; Signal Y: Microwaves

D

Signal X: Ultraviolet; Signal Y: Radio waves

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Waves Questions

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