Match List-$I$ (Wavelength range of electromagnetic spectrum) with List-$II$ (Method of production of these waves) and select the correct option from the options given below the lists:
List-$I$ List-$II$
$(1)$ $700\, nm$ to $1\, mm$ $(i)$ Vibration of atoms and molecules
$(2)$ $1\, nm$ to $400\, nm$ $(ii)$ Inner shell electrons in atoms moving from one energy level to a lower level
$(3)$ $< 10^{-3}\, nm$ $(iii)$ Radioactive decay of the nucleus
$(4)$ $1\, mm$ to $0.1\, m$ $(iv)$ Magnetron valve

  • A
    $(1)-(iv), (2)-(iii), (3)-(ii), (4)-(i)$
  • B
    $(1)-(iii), (2)-(iv), (3)-(i), (4)-(ii)$
  • C
    $(1)-(ii), (2)-(i), (3)-(iii), (4)-(iv)$
  • D
    $(1)-(i), (2)-(ii), (3)-(iii), (4)-(iv)$

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Which one of the following has the minimum wavelength?

The electromagnetic waves of frequency $6 GHz$ are used in

In the following,List $A$ consists of the wavelength range of different $EM$ waves and List $B$ consists of ways to produce them. Match the following lists.
| List $A$ | List $B$ |
| :--- | :--- |
| $A$. $400 \ nm$ to $1 \ nm$ | $1$. Radioactive decay of the nucleus. |
| $B$. $> 0.1 \ nm$ | $2$. Vibration of atoms and molecules. |
| $C$. $1 \ mm$ to $700 \ nm$ | $3$. Rapid acceleration and deceleration of electrons in aerials. |
| $D$. $< 10^{-3} \ nm$ | $4$. Inner shell electrons in atoms moving from one energy level to a lower level. |

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The frequency range of visible light is . . . . . . .

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