Arrange the following electromagnetic waves in increasing order of their…
2025
Arrange the following electromagnetic waves in increasing order of their frequency range: (A) Microwaves (B) Infrared Waves (C) Light Waves (D) Radio Waves
Answer: D. (D), (A), (B), (C) — ConceptFrequency and wavelength are inversely related for electromagnetic waves: c = fλ. Therefore, moving from longer wavelength to shorter wavelength gives…
- A.
(A), (C), (D), (B)
- B.
(D), (C), (B), (A)
- C.
(B), (A), (D), (C)
- D.
(D), (A), (B), (C)
Attempted by 3 students.
Show answer & explanation
Correct answer: D
Concept
Frequency and wavelength are inversely related for electromagnetic waves: c = fλ. Therefore, moving from longer wavelength to shorter wavelength gives increasing frequency. In the standard spectrum, the relevant bands progress from radio waves to microwaves to infrared and then visible light.
Application
Identify the labels in the stem: D denotes radio waves, A denotes microwaves, B denotes infrared waves, and C denotes light waves.
Place the bands from the lowest to the highest frequency: radio waves → microwaves → infrared waves → light waves.
Cross-check
The wavelength order is the reverse: light has the shortest wavelength among these bands, while radio waves have the longest. This confirms the frequency ordering.
Result
Thus, the increasing-frequency sequence is (D), (A), (B), (C).