Physics Dawn of Modern Physics SZABMU 2023
PMDC Verified Question 17 of 52
Which is the correct 'ascending order' in which the following photons are arrange according to their energy?
A
Gamma rays, ultraviolet rays, microwaves
B
Microwaves, ultraviolet rays, gamma rays
C
Gamma rays, microwaves, ultraviolet rays
D
Ultraviolet rays, gamma rays, microwaves
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Microwaves, ultraviolet rays, gamma rays
Concept:

The electromagnetic spectrum classifies waves. Energy per photon directly scales with frequency.

Formula:

$$ E \propto f $$

Solution:

  • "Ascending order" means starting with the lowest energy and moving to the highest energy.


  • Microwaves have long wavelengths and very low energy.


  • Ultraviolet rays sit above visible light and have intermediate energy.


  • Gamma rays have incredibly short wavelengths and the highest energy in the universe.


  • The sequence is: Microwaves \( \rightarrow \) Ultraviolet \( \rightarrow \) Gamma rays.


Why other options are incorrect:

Any order starting with Gamma rays is a descending order. Placing ultraviolet below microwaves is factually incorrect regarding the EM spectrum.

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