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The electromagnetic spectrum

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Question 18

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.

Signal X: Visible light; Signal Y: Radio waves

Signal X: X-rays; Signal Y: Microwaves

Signal X: Ultraviolet; Signal Y: Microwaves

Signal X: Ultraviolet; Signal Y: Radio waves

The electromagnetic spectrum Questions

  1. IGCSE
  2. /Physics
  3. /The electromagnetic spectrum