Question

Arrange the following radiation in increasing order of their wavelength:
(A) UV-C
(B) UV-B
(C) UV-A
(D) Infra-red
(E) Microwave
Choose the correct answer from the options given below:

• A. (C), (B), (A), (D), (E)
• B. (A), (B), (C), (E), (D)
• C. (A), (B), (C), (D), (E)
• D. (E), (D), (C), (B), (A)

Answer 1

The Correct Option is C

For electromagnetic radiation, wavelength ranges are generally as follows:

• UV-C: Approximately 100–280 nm (nanometers)
• UV-B: Approximately 280–315 nm
• UV-A: Approximately 315–400 nm
• Infra-red: Approximately 700 nm to 1 mm
• Microwave: Approximately 1 mm to 1 meter

Therefore, arranging these categories by increasing wavelength from shortest to longest gives us: (A) UV-C, (B) UV-B, (C) UV-A, (D) Infra-red, (E) Microwave.

The correct option is: (A), (B), (C), (D), (E).

Answer 2

The correct arrangement of radiation in increasing order of wavelength is (A), (B), (C), (D), (E).

Additional Context:

• Electromagnetic Spectrum Order:
  1. UV-C (A): 100-280 nm (shortest wavelength)
  2. UV-B (B): 280-315 nm
  3. UV-A (C): 315-400 nm
  4. Infrared (D): 700 nm-1 mm
  5. Microwave (E): 1 mm-1 m (longest wavelength)
• Key Relationships:
  • Wavelength ∝ 1/Energy
  • UV-C is most energetic but completely absorbed by atmosphere
• Practical Implications:
  • UV-B causes sunburns, UV-A causes aging
  • Infrared used in thermal imaging
  • Microwaves used in communication and cooking

Correct Answer: (3) (A), (B), (C), (D), (E).