The frequency range of visible light is . . | vedclass

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(A) The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.Visible light has a wavelength range of appro

Vedclass · Accepted Answer

$400 	ext{ THz}$ to $700 	ext{ THz}$

Vedclass · Answer

(A) The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.Visible light has a wavelength range of approximately $400 	ext{ nm}$ to $700 	ext{ nm}$.Using the relation $c = f \lambda$,where $c = 3 	imes 10^8 	ext{ m/s}$ is the speed of light,we can calculate the frequency $f = c / \lambda$.For $\lambda = 700 	ext{ nm} = 700 	imes 10^{-9} 	ext{ m}$,$f = (3 	imes 10^8) / (700 	imes 10^{-9}) \approx 4.29 	imes 10^{14} 	ext{ Hz} = 429 	ext{ THz}$.For $\lambda = 400 	ext{ nm} = 400 	imes 10^{-9} 	ext{ m}$,$f = (3 	imes 10^8) / (400 	imes 10^{-9}) = 7.5 	imes 10^{14} 	ext{ Hz} = 750 	ext{ THz}$.Thus,the frequency range is approximately $400 	ext{ THz}$ to $750 	ext{ THz}$,which aligns with option $A$.

List-$I$	List-$II$
$(a)$ Ultraviolet rays	$(i)$ Study crystal structure
$(b)$ Microwaves	$(ii)$ Greenhouse effect
$(c)$ Infrared waves	$(iii)$ Sterilizing surgical instruments
$(d)$ $X$-rays	$(iv)$ Radar system

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

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