(A) The electromagnetic spectrum is arranged in order of increasing frequency and decreasing wavelength. Radio waves have the lowest frequency and the

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(A) The electromagnetic spectrum is arranged in order of increasing frequency and decreasing wavelength. Radio waves have the lowest frequency and the longest wavelength in the electromagnetic spectrum. Therefore,among the given options,radio waves have the longest wavelength.

Class 12 Physics Electromagnetic waves Electromagnetic Spectrum

Easy

Which of the following electromagnetic waves has the longest wavelength?

A
Radio waves
B
Ultraviolet radiation
C
$X$-rays
D
Visible light

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Class 12 Questions

Class 12

Physics Questions

Chapter

Electromagnetic waves

Subtopic

Electromagnetic Spectrum

Snakes can detect which type of waves?

Medium

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If a source of $4 \ kW$ power emits $10^{20}$ photons/second,then this radiation belongs to which part of the electromagnetic spectrum?

Medium

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Which of the following electromagnetic waves are used in telecommunication?

Easy

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If an electron oscillates at a frequency of $1 \, GHz$,it emits:

Easy

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

List-$I$ List-$II$

$A$. Microwaves $I$. Radioactive decay of the nucleus

$B$. Gamma rays $II$. Rapid acceleration and deceleration of electrons in aerials

$C$. Radio waves $III$. Inner shell electrons

$D$. $X$-rays $IV$. Klystron valve

Choose the correct answer from the options given below:

List-$I$	List-$II$
$A$. Microwaves	$I$. Radioactive decay of the nucleus
$B$. Gamma rays	$II$. Rapid acceleration and deceleration of electrons in aerials
$C$. Radio waves	$III$. Inner shell electrons
$D$. $X$-rays	$IV$. Klystron valve