What is the frequency of an electromagnetic wave if its wavelength is 3 meters and the speed of light is 3 times 10 to the power of 8 meters per second?

A. 10^8 Hz — The relationship between speed, frequency, and wavelength is given by c = f * lambda. Rearranging for frequency gives f = c / lambda, which results in 3 * 10^8 / 3 = 10^8 Hz.

JEE Main · PhysicsEasy

$What is the frequency of an electromagnetic wave if its wavelength is λ = 3 m and the speed of light is c = 3 \times 1 0^{8} m/s ?$

A. $1 0^{8} Hz$
B. $3 \times 1 0^{8} Hz$
C. $9 \times 1 0^{8} Hz$
D. $1 0^{7} Hz$

Show correct answer & step-by-step solution

Correct answer: A — $1 0^{8} Hz$

Solution

The relationship between speed, frequency, and wavelength is given by c = f λ . Rearranging for frequency gives f = \frac{c}{λ}, which results in f = \frac{3 \times 1 0 ^{8}}{3} = 1 0^{8} Hz .

Attempt this question & track your score

Attempt & Track Free →

More Electromagnetic Waves practice questions

$Which of the following electromagnetic waves has the longest wavelength?$
$The speed of electromagnetic waves in a vacuum is given by the expression involving the permeability of free space mu0 a$
$Electromagnetic waves are transverse in nature. This is evident from the fact that they can be:$
$What is the frequency of an electromagnetic wave if its wavelength is 3 meters and it travels at the speed of light 3 ti$
$Which part of the electromagnetic spectrum is used in radar systems for aircraft navigation?$
$An electromagnetic wave is propagating in a vacuum with an electric field given by E = E0 sin(kx - omega*t) j-cap. What$
$T h e in t e n s i t y o f an e l ec t r o ma g n e t i c w a v e i s 0.06 W / m^{2} . W ha t i s t h e ma x im u m v a l u eo f t h e ma g n e t i c f i e l d a ssoc ia t e d w i t h$
$A plane electromagnetic wave travels in free space along the x-direction. If the frequency of the wave is 50 MHz, what i$
$Which of the following statements is correct regarding the energy density of an electromagnetic wave?$
$A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular p$
$T h e in t e n s i t y o f a pl an ee l ec t r o ma g n e t i c w a v e i s 0.02 W / m^{2} . W ha t i s t h er a d ia t i o n p r ess u r ee x er t e d b y t hi s w a v eo na p e$
$A parallel plate capacitor with circular plates of radius R is being charged. The displacement current between the plate$

View all Electromagnetic Waves questions →

What is the frequency of an electromagnetic wave if its wavelength is λ=3 m and the speed of light is c=3×108 m/s?

Solution

Attempt this question & track your score

More Electromagnetic Waves practice questions

$What is the frequency of an electromagnetic wave if its wavelength is λ = 3 m and the speed of light is c = 3 \times 1 0^{8} m/s ?$