Q39.Arrange the following in the ascending order of wavelength (λ) : (A) Microwaves (λ1) (B) Ultraviolet rays (λ2) (C) Infrared rays (λ3) (D) X-rays (λ4) Choose the most appropriate answer from the options given below : (1) λ4 < λ3 < λ2 < λ1 (2) λ3 < λ4 < λ2 < λ1 (3) λ4 < λ3 < λ1 < λ2 (4) λ4 < λ2 < λ3 < λ1
What This Question Tests
This question directly tests the knowledge of the electromagnetic spectrum, specifically the ascending order of wavelengths for different types of electromagnetic waves.
Concepts Tested
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
12.3 — A Difference Of 2.3 Ev Separates Two Energy Levels In An Atom. What
Physics Class 12 · Chapter 12
12.3 A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?
10.4 — In A Young’S Double-Slit Experiment, The Slits Are Separated By
Physics Class 12 · Chapter 10
10.4 In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.
📋 Question Details
- Chapter
- EM Waves
- Topic
- Electromagnetic spectrum
- Year
- 2025
- Shift
- 24 Jan Shift 2
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 8: Electromagnetic Waves
More from this Chapter
Q62.Infra red radiation is detected by (1) spectrometer (2) pyrometer (3) nanometer (4) photometer
Q63.Which of the following are not electromagnetic waves? (1) cosmic rays (2) gamma rays (3) β-rays (4) X- rays
Q61.Electromagnetic waves are transverse in nature is evident by (1) polarization (2) interference (3) reflection (4) diffraction
Q2. Dimension of 1 , where symbols have their usual meaning, are μ0ε0 (1) [L−1 T] (2) [L−2 T2] (3) [L2 T−2] (4) [LT−1]