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Q68 (NDA-I/2009) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Waves and acoustics Answer Verified

Match List I with List II and select the correct answer using the code given below the lists: List I (Type of electromagnetic radiation) A. Infrared radiation B. X-rays C. Ultraviolet radiation D. Gamma rays List II (Approx. wave length in meter) 1. 10^-12 2. 10^-5 3. 10^-10 4. 10 ^-8 Code: A B C D

Result
Your answer: —  Â·  Correct: A
Explanation

The electromagnetic spectrum is categorized by wavelength and frequency. Infrared radiation (A) has wavelengths longer than visible light, typically ranging from 780 nm to 1 mm; thus, 10^-5 m (2) is a representative value within the infrared region [t6, t9]. X-rays (B) have much shorter wavelengths, typically ranging from 10^-8 m to 10^-13 m, making 10^-10 m (3) the appropriate match [t5]. Ultraviolet radiation (C) falls between visible light and X-rays, with wavelengths approximately between 10 nm and 400 nm, corresponding to 10^-8 m (4) [t6, t7]. Gamma rays (D) are the most energetic with the shortest wavelengths, typically on the order of 10^-12 m (1) or less [t8]. Matching these gives the sequence A-2, B-3, C-4, D-1, which corresponds to Option 1.

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