Looking for classes? Ksquare Career Institute, Bengaluru →
Electromagnetic Waves
Electromagnetic Spectrum
9 questions from 9 papers, each with its answer.
- questions
- 9
- papers
- 9
- years asked, 2017–2026
- 3 of 10
- of Electromagnetic Waves
- 18.37%
Appears in
Concepts tested
- Electromagnetic spectrum 2
- Order of wavelengths 2
- Beta rays are particles
- Order of frequencies
- Order of wavelengths in the EM spectrum
- Wavelength from photon energy
- wavelengths of EM spectrum regions
All Questions
2024 Re-NEET 1 question
-
The electromagnetic radiation which has the smallest wavelength areAmong the given options, gamma rays have the highest frequency and hence the smallest wavelength in the electromagnetic spectrum.
2022 1 question
-
Match List-I (Electromagnetic waves) with List-II (Wavelength)
Pick the matching item from Column II for each row.
Column I
- A. AM radio waves
- B. Microwaves
- C. Infrared radiations
- D. X-rays
Column II
- I. $10^{-10}$ m
- II. $10^{2}$ m
- III. $10^{-2}$ m
- IV. $10^{-4}$ m
Correct answer: A → II, B → III, C → IV, D → I
AM radio waves – $10^2$ m Microwaves – $10^{-2}$ m Infrared radiations – $10^{-4}$ m X-rays – $10^{-10}$ m (≈ 1 Å) Correct match: A-II, B-III, C-IV, D-I.
2020 Phase-2 1 question
-
The E.M. wave with shortest wavelength among the following is,Among the given radiations, gamma rays have the highest frequency and hence the shortest wavelength in the electromagnetic spectrum.
2015 AIPMT-II 1 question
-
The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong?$\lambda = \frac{hc}{E} = \frac{12400\ \text{eV Å}}{15000\ \text{eV}} \approx 0.826$ Å
Since $\lambda < 100$ Å, the radiation is X-rays.
2011 AIPMT-PRE 1 question
-
The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays isThe electromagnetic spectrum in order of decreasing wavelength is: radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays.
Typical wavelengths: microwaves about $10^{-1}$ to $10^{-3}$ m, infrared about $10^{-3}$ to $7\times10^{-7}$ m, ultraviolet about $4\times10^{-7}$ to $10^{-9}$ m, gamma rays less than $10^{-12}$ m.
Picking the four given radiations in this order gives microwave > infrared > ultraviolet > gamma rays.
Hence the decreasing order of wavelength is microwave, infrared, ultraviolet, gamma rays.
2005 AIPMT 1 question
-
If $\lambda_v$, $\lambda_x$ and $\lambda_m$ represent the wavelengths of visible light, x-rays and microwaves respectively, then -The electromagnetic spectrum in decreasing order of wavelength is: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays.
Microwaves have wavelengths of about 1 mm to 0.3 m.
Visible light has wavelengths of about 400 nm to 700 nm.
X-rays have wavelengths of about $10^{-8}$ m to $10^{-13}$ m.
So $\lambda_m \gt \lambda_v \gt \lambda_x$
2003 AIPMT 1 question
-
Which of the following rays are not electromagnetic wavesElectromagnetic waves are oscillating electric and magnetic fields travelling at the speed of light; they carry no charge and no rest mass.
X-rays, $\gamma$-rays and heat rays (infrared) are all parts of the electromagnetic spectrum.
$\beta$-rays are streams of fast-moving electrons emitted from nuclei in beta decay. They are charged material particles and are deflected by electric and magnetic fields.
So $\beta$-rays are not electromagnetic waves.
2002 AIPMT 1 question
-
Which is having minimum wavelength : -Increasing order of wavelength in the electromagnetic spectrum: $\gamma$-rays $\lt$ X-rays $\lt$ ultraviolet $\lt$ visible $\lt$ infrared $\lt$ microwaves $\lt$ radio waves.
Cosmic rays are extremely high energy radiation/particles coming from outer space. Their energy is even higher than that of $\gamma$-rays, so their associated wavelength is the shortest.
So, as per the answer key, cosmic rays have the minimum wavelength.
2000 AIPMT 1 question
-
The frequency order for $\gamma$-rays (b), X-rays (a), UV-rays (c) :In the electromagnetic spectrum, frequency increases as wavelength decreases.
Order of frequency: $\gamma$-rays $\gt$ X-rays $\gt$ ultraviolet rays.
With the given labels: b ($\gamma$) $\gt$ a (X-rays) $\gt$ c (UV).
So the order is b > a > c.