NCERT Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Solutions: Are you also a class 12 board student preparing for the upcoming 2025 board exams? Well, don’t worry as we got you covered. Students can refer to this article to get the solutions in one place. These solutions will aid in understanding Chapter 11 of Class 12 Physics, "Dual Nature of Radiation and Matter." The NCERT Solutions for Chapter 11, covers theoretical concepts and numerical problems. Read on to find solutions to all exercises in Chapter 11 of Class 12 Physics NCERT.
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| CBSE Class 12 Physics Exam Pattern and Marking Scheme for 2025 |
NCERT Class 12 Physics Chapter-11 Dual Nature of Radiation and Matter Solutions
Students can take a look at some of the questions that are provided below. The rest of the questions along with their answers will be provided in the PDF format that the students can download for free from this article.
1. Find the
(a) maximum frequency, and
(b) the minimum wavelength of X-rays produced by 30 kV electrons.
2. The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?
3. Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW.
(a) Find the energy and momentum of each photon in the light beam,
(b) How many photons per second, on average, arrive at a target irradiated by this beam? (Assume the beam to have a uniform cross-section which is less than the target area), and
(c) How fast does a hydrogen atom have to travel to have the same momentum as that of the photon?
4. The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?
5. Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.
6. Show that the wavelength of electromagnetic radiation is equal to the de Broglie wavelength of its quantum (photon).
To get the rest of the questions along with their answers, download the PDF below for free:
CBSE Class 12 Physics Syllabus 2024-25
We are also providing the revised syllabus for the students for the current academic year 2024-25. Students can check the complete syllabus here so that there is no confusion.
| No. of Periods | Marks | ||
| Unit–I | Electrostatics | 26 | 16 |
| Chapter–1: Electric Charges and Fields | |||
| Chapter–2: Electrostatic Potential and Capacitance | |||
| Unit-II | Current Electricity | 18 | |
| Chapter–3: Current Electricity | |||
| Unit-III | Magnetic Effects of Current and Magnetism | 25 | 17 |
| Chapter–4: Moving Charges and Magnetism | |||
| Chapter–5: Magnetism and Matter | |||
| Unit-IV | Electromagnetic Induction and Alternating Currents | 24 | |
| Chapter–6: Electromagnetic Induction | |||
| Chapter–7: Alternating Current | |||
| Unit–V | Electromagnetic Waves | 4 | 18 |
| Chapter–8: Electromagnetic Waves | |||
| Unit–VI | Optics | 30 | |
| Chapter–9: Ray Optics and Optical Instruments | |||
| Chapter–10: Wave Optics | |||
| Unit–VII | Dual Nature of Radiation and Matter | 8 | 12 |
| Chapter 11: Dual Nature of Radiation and Matter | |||
| Unit–VIII | Atoms and Nuclei | 15 | |
| Chapter–12: Atoms | |||
| Chapter–13: Nuclei | |||
| Unit–IX | Electronic Devices | 10 | 7 |
| Chapter–14: Semiconductor Electronics: Materials, Devices and Simple Circuits | |||
| Total | 160 | 70 | |
This is the syllabus for CBSE Class 12 Physics along with the solutions for Chapter 11 Dual Nature of Radiation and Matter. Students can download the PDF for free to get the questions and answers here. Till then, students can take a look at other provided links.
Also, check
- CBSE 12th Date Sheet 2025 Download PDF
- CBSE Class 12 Physics Study Material for 2025
- CBSE Class 12 Physics Most Repeated Questions
- CBSE Class 12 Physics Competency-Based Questions With Answer Key 2024-25
- CBSE Class 12 Physics Topper Answer Sheet for 2025 Exams
- CBSE Class 12 Physics 90 Days Study Plan for 2025 Exam
- NCERT Solutions for Class 12 (2024-2025) All Subjects
- NCERT Books for CBSE Class 12 - Latest Edition
- NCERT Rationalised Content for Class 12
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