Match List-I with List-II
| List-I | List-II |
| Frequency Range | EM waves |
| (A) \( 4\times10^{14} \) Hz - \( 7.5\times10^{14} \) Hz | (I) Infrared rays |
| (B) \( 3\times10^{17} \) Hz - \( 3\times10^{20} \) Hz | (II) Microwaves |
| (C) \( 3\times10^{9} \) Hz - \( 3\times10^{11} \) Hz | (III) Visible light |
| (D) \( 3\times10^{11} \) Hz - \( 4\times10^{14} \) Hz | (IV) X-rays |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) - (III), (B) - (IV), (C) - (II), (D) - (I)
The electromagnetic spectrum in increasing frequency runs: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays. Place each range in this order.
(A) \( 4\times10^{14} \) Hz - \( 7.5\times10^{14} \) Hz — this matches (III) Visible light. This is the band the eye responds to (wavelengths of about 400 nm to 750 nm).
(B) \( 3\times10^{17} \) Hz - \( 3\times10^{20} \) Hz — this matches (IV) X-rays. These very high frequencies lie above the ultraviolet.
(C) \( 3\times10^{9} \) Hz - \( 3\times10^{11} \) Hz — this matches (II) Microwaves. This band lies just above the radio waves.
(D) \( 3\times10^{11} \) Hz - \( 4\times10^{14} \) Hz — this matches (I) Infrared rays. This band lies between the microwaves and the visible light.