Single Choice

Electromagnetic waves of wavelength ranging from $$100\overset {\circ}{A}$$ to $$400 \overset {\circ}{A}$$ comes under :

AX-rahs
BUV region
Correct Answer
CVisible region
DInfrared region

Solution

Name Wavelength Frequency (Hz) Photon Energy (eV)
Gamma Less than 0.01 nm More than 10EHz 100kev - 300+ GeV
X-ray 0.01-10 nm 30EHz-30 PHz 120 eV-120 keV
Ultraviolet 10 nm-400nm 30 Phz-790 THz 3 eV-124 ev
Visible 390nm-750nm 790THz-405Thz 1.7 eV-3.3eV
Infrared 750 nm -1mm 405 THz-300 GHz 1.24meV-1.7eV
Microwave 1 mm- 1 meter 300 GHz -300MHz 1.24 $$\mu $$eV-1.24 MeV
Radio 1 mm- km 300GHz -3Hz 12.4 feV-1.24 meV

The range 100 $$A^0$$ to 400$$A^0$$ come under Ultraviolet spectrum.

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