(B) The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. It typically ranges from approximately $4000

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$4000 \, \mathring{A}$ to $7000 \, \mathring{A}$

(B) The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. It typically ranges from approximately $4000 \, \mathring{A}$ (violet) to $7000 \, \mathring{A}$ (red). This corresponds to a frequency range of approximately $4 \times 10^{14} \, \text{Hz}$ to $7.5 \times 10^{14} \, \text{Hz}$.

Class 12 Physics Electromagnetic waves Electromagnetic Spectrum

Easy

What is the wavelength range of visible light?

A
$10 \, \mathring{A}$ to $100 \, \mathring{A}$
B
$4000 \, \mathring{A}$ to $7000 \, \mathring{A}$
C
$8000 \, \mathring{A}$ to $10000 \, \mathring{A}$
D
$10000 \, \mathring{A}$ to $15000 \, \mathring{A}$

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Class 12

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Chapter

Electromagnetic waves

Subtopic

Electromagnetic Spectrum

Match List-$I$ with List-$II$:

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

Choose the correct answer from the options given below:

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