Question

Match the List -I (Phenomenon associated with electromagnetic radiation) with List - II (Part of electromagnetic spectrum) and select the correct code from the choices given below the

	List - I		List - II
I	Doublet of sodium	A	Visible radiation
II	Wavelength corresponding to temperature associated with the isotropic radiation filling all space	B	Microwave
III	Wavelength emitted by atomic hydrogen in interstellar space	C	Short radiowave
IV	Wavelength of radiation arising from two close energy levels in hydrogen	D	X-rays

• A. (I)-(A), (II)-(B), (III)-(B), (IV)-(C)
• B. (I)-(D), (II)-(C), (III)-(A), (IV)-(B)
• C. (I)-(B), (II)-(A), (III)-(D), (IV)-(A)
• D. (I)-(A), (II)-(B), (III)-(C), (IV)-(D)

Answer 1

The correct option is B (I)-(D), (II)-(C), (III)-(A), (IV)-(B)

$Doubletofsodium$$\Rightarrow$$X-rays$
$Wavelengthcorrespondingtotemperatureassociatedwiththeisotropicradiationfillingallspace$$\Rightarrow$$Shortradiowave$
$Wavelengthemittedbyatomichydrogenininterstellarspace$$\Rightarrow$$Visibleradiation$
$Wavelengthofradiationarisingfromtwocloseenergylevelsin.hydrogen$$Rightarrow$$Microwave$.