Environmental Physics

Step 1: Understanding the Concept:
The question asks to arrange different types of electromagnetic radiation in ascending order of their frequency. Ascending frequency also means ascending energy and descending wavelength.

Step 3: Detailed Explanation:
The electromagnetic spectrum, arranged from lowest frequency (longest wavelength) to highest frequency (shortest wavelength), is as follows:
1. (B) Radio-wave: Lowest frequency. 2. (A) Micro-wave: Higher frequency than radio waves. 3. (E) Infrared radiations: Higher frequency than microwaves. 4. Visible Light (not listed) 5. (D) UV Rays (Ultraviolet): Higher frequency than visible light. 6. X-Rays (not listed) 7. (C) Gamma Rays: Highest frequency.
Therefore, the correct ascending order of frequency is Radio-wave Micro-wave Infrared radiations UV Rays Gamma Rays.

Step 4: Final Answer:
The correct sequence is (B), (A), (E), (D), (C).