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Electromagnetic Waves question

2024 · 5 Apr · Shift 2 · Q64
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  5. /2024 · 5 Apr · Shift 2 · Q64

Electromagnetic Waves question

2024 · 5 Apr · Shift 2 · Q64

JEE MainPhysicsElectromagnetic WavesMCQ+4 / −1

Match List I with List II :

LIST I
EM-Wave
LIST II
Wavelength Range
A. Infra-red I. <10−3\lt 10^{-3}<10−3 nm
B. Ultraviolet II. 400 nm to 1 nm
C. X-rays III. 1 mm to 700 nm
D. Gamma rays IV. 1 nm to 10−310^{-3}10−3 nm

Choose the correct answer from the options given below :

  1. A
    (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
  2. B
    (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
  3. C
    (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
  4. D
    (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
View written solutionFree

Correct answer: B

  1. We match each electromagnetic wave with its standard wavelength range.

  2. Recall the usual order of EM waves by decreasing wavelength:

Radio>Microwave>Infrared>Visible>Ultraviolet>X-rays>Gamma rays\text{Radio} > \text{Microwave} > \text{Infrared} > \text{Visible} > \text{Ultraviolet} > \text{X-rays} > \text{Gamma rays}Radio>Microwave>Infrared>Visible>Ultraviolet>X-rays>Gamma rays
  1. Now identify each range from List II:
  • III. 1 mm1\,\text{mm}1mm to 700 nm700\,\text{nm}700nm
    This corresponds to Infra-red.

  • II. 400 nm400\,\text{nm}400nm to 1 nm1\,\text{nm}1nm
    This corresponds to Ultraviolet.

  • IV. 1 nm1\,\text{nm}1nm to 10−3 nm10^{-3}\,\text{nm}10−3nm
    This corresponds to X-rays.

  • I. <10−3 nm<10^{-3}\,\text{nm}<10−3nm
    This corresponds to Gamma rays.

  1. Therefore the correct matching is:
A→III,B→II,C→IV,D→IA \to III, \quad B \to II, \quad C \to IV, \quad D \to IA→III,B→II,C→IV,D→I
  1. Compare with the options:
  • Option B: (A)−(III),(B)−(II),(C)−(IV),(D)−(I)(A)-(III), (B)-(II), (C)-(IV), (D)-(I)(A)−(III),(B)−(II),(C)−(IV),(D)−(I) ✅

Hence, the correct answer is Option B.

  1. Comparison with stored correct answer:
    Stored correct answer is B, which matches the derived answer.
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