Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectromagnetic Waves

An electromagnetic wave travelling through a vacuum is represented by E = E₀ (kx - t) . Which of the following quantities does not depend on the wavelength?

Options

  1. Ak
  2. Bk/
  3. Ck

Correct answer

B. k/

Step-by-step solution

The wave number is given by k = 2 and the angular frequency is = 2 c , where c is the speed of light in vacuum. Evaluating the given options: k = 2 , which depends on . k = 2 2 c = 1 c . Since the speed of light in vacuum is a constant, this ratio is independent of . = 2 c , which depends on . k = 4 ^2 c ^2 , which depends on . Thus, the quantity k does not depend on the wavelength.

Practice Electromagnetic Waves on Quantrex Academy →

More from Electromagnetic Waves

The electric field associated with an electromagnetic wave travelling in vacuum is given by E₀ (3y + 4z + t) , i , where is the angular frequency. All quantities are in SI units. T 2026A monochromatic source of light operating at 15 kW emits 2.5 10²² photons/s. The region of an electromagnetic spectrum to which the emitted electromagnetic radiation belongs to ___ 2026For an electromagnetic wave propagating through vacuum, k , E and represent propagation vector, electric field and angular frequency, respectively. The magnetic field associated wi 2026A point light source emits E.M. waves in free space. A detector, placed at a distance of L m, measures the intensity as I_o . The detector is now shifted to another location on the 2026A displacement current of 4.0 A can be set up in the space between two parallel plates of 6 F capacitor. The rate of change of potential difference across the plates of the capacit 2026A magnetic field vector in an electromagnetic wave is represented by B =B₀ (2 vt- 2 x ) j . Its associated electric field vector is ______. 2026An electromagnetic wave travels in free space along the x -direction. At a particular point in space and time, B = 2 10⁻⁷ j T is associated with this wave. The value of correspondi 2026An electromagnetic wave travelling in x -direction is described by field equation E_y = 300 (t - x c ) . If the electron is restricted to move in y -direction only with speed of 1. 2026 Full Electromagnetic Waves list All Concepts Of Physics MCQ Edition [Volume 2] PYQs