Match the following types of waves with their wavelength ranges:
$i$. Microwave$(a)$. $700 \ nm$ to $400 \ nm$
$ii$. Visible light$(b)$. $1 \ nm$ to $10^{-3} \ nm$
$iii$. Ultraviolet$(c)$. $0.1 \ m$ to $1 \ mm$
$iv$. $X$-rays$(d)$. $400 \ nm$ to $1 \ nm$

  • A
    $i-c, ii-a, iii-d, iv-b$
  • B
    $i-d, ii-b, iii-c, iv-a$
  • C
    $i-b, ii-c, iii-a, iv-d$
  • D
    $i-a, ii-d, iii-b, iv-c$

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Match List-$I$ with List-$II$:
List-$I$ (Electromagnetic wave)List-$II$ (Production)
$A$. Microwave$I$. Electrons in atoms emit light when they move from a higher energy level to a lower energy level
$B$. Visible light$II$. Radioactive decay of nucleus
$C$. Gamma rays$III$. Vibration of atoms and molecules
$D$. Infra-red rays$IV$. Klystron valve or magnetron valve

Choose the correct answer from the options given below:

Electromagnetic radiation of highest frequency is

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