Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 20204 SeptemberMorning Shift
Exam
JEE Main
Year
2020
Date
4 September
Shift
Morning Shift
Subject
Physics
Chapter
Electromagnetic Waves

JEE Main 2020 · 4 September · Morning Shift · Physics · Electromagnetic Waves

Choose the correct option relating wavelengths of different parts...

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

Options

  1. Aλvisible<λmicrowaves<λradiowaves<λx-rays{\lambda}_{\text{visible}} < {\lambda}_{\text{micro}\text{waves}} < {\lambda}_{\text{radio}\text{waves}} < {\lambda}_{\text{x-rays}}
  2. Bλradiowaves>λmicrowaves>λvisible>λx-rays{\lambda}_{\text{radio}\text{waves}} > {\lambda}_{\text{micro}\text{waves}} > {\lambda}_{\text{visible}} > {\lambda}_{\text{x-rays}}
  3. Cλx-rays<λmicrowaves<λradiowaves<λvisible{\lambda}_{\text{x-rays}} < {\lambda}_{\text{micro}\text{waves}} < {\lambda}_{\text{radio}\text{waves}} < {\lambda}_{\text{visible}}
  4. Dλvisible>λx-rays>λradiowaves>λmicrowaves{\lambda}_{\text{visible}} > {\lambda}_{\text{x-rays}} > {\lambda}_{\text{radio}\text{waves}} > {\lambda}_{\text{micro}\text{waves}}

Correct answer

B. λradiowaves>λmicrowaves>λvisible>λx-rays{\lambda}_{\text{radio}\text{waves}} > {\lambda}_{\text{micro}\text{waves}} > {\lambda}_{\text{visible}} > {\lambda}_{\text{x-rays}}

Step-by-step solution

First, recall the spectrum of electromagnetic waves, and we know that in the case of electromagnetic waves the frequency is inversely proportional to wavelength.

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

Now from the above spectrum, we can say that, the relations of wavelength,

λradio waves>λmicro waves>λvisible>λx-rays{\lambda}_{\text{radio waves}} > {\lambda}_{\text{micro waves}} > {\lambda}_{\text{visible}} > {\lambda}_{\text{x-rays}}.

Practice Electromagnetic Waves on Quantrex Academy →

More from Electromagnetic Waves

The electric field associated with an electromagnetic wave travelling in vacuum is given… JEE Advanced 2026A monochromatic source of light operating at 15 kW emits 2.5× 10^ 22 photons/s. The… JEE Main 2026For an electromagnetic wave propagating through vacuum, k , E and ω represent propagation… JEE Main 2026A point light source emits E.M. waves in free space. A detector, placed at a distance of… JEE Main 2026A displacement current of 4.0 A can be set up in the space between two parallel plates of… JEE Main 2026A magnetic field vector in an electromagnetic wave is represented by B =B_0 (2π vt-(2π… JEE Main 2026An electromagnetic wave travels in free space along the x -direction. At a particular… JEE Main 2026An electromagnetic wave travelling in x -direction is described by field equation E_y =… JEE Main 2026 Full Electromagnetic Waves list All JEE Main PYQs