Class 12 Physics Ch 10

CBSE Class 12 Physics Chapters 10 Wave Optics

CBSE Class 12 Ch 10 Wave Optics Revision Notes
In order to create the most suitable notes for the 12th Physics course, the physics wallah team has conducted a thorough analysis of a vast number of previous years' test questions. Our aim is to ensure that every student receives a superior education. All educational materials are available on various platforms and are available in PDF form. With a single click, students are able to access the Physics class 12 Solutions. To Wave Optics NCERT Solutions for Class 12 Physics


 NCERT Solutions for Class-12 Physics Chapter 10 Wave Optics Our experienced instructors at Physics Wallah have got you covered! Before diving into the NCERT questions, make sure to read the theory. You can easily download and share the solutions at Physics Wallah. The chapter is based on the current CBSE Syllabus 2023-24 and covers important topics like Huygens' law, Brewster law, and diffraction patterns. The solutions include theory, deduction, and numerical problems from various disciplines. Download the free PDF and keep it handy for board test preparation.

 Wavefront: it is the continuous location of all these particles in the medium, which vibrate in the same phase of oscillation at any time.
 Depending on the size of the light source, the wavefront is made up of different shapes.
 (i) plane wavefront
 (ii) circular wave
 (iii) cylindrical wave

 Rays: Rays are arrows perpendicular to the wave front in the direction of propagation of a wave.
 Time required: the time required for light to pass from one wavefront to another is called the time required for the beam.

 Huygens' theory:
 According to Huygens, each point on a given wavefront (called the primary wavefront) acts as a new source of new disturbance, called the secondary wave, with the speed of light in a given medium in all directions.  Travel in
 The surface that touches these secondary waves, when touched forward in any instantaneous direction, gives a new wavefront at that instant.  This is called the secondary wave.
 Huygens construction theory:
 It is based on the principle that each point of a wave is a secondary wave source.
 The envelope of these wave fronts, that is to say the surface of all the secondary fronts, gives a new wave front to the tangent.

 Law of refraction:
 Reflection of plane
waves using the Huygens principle: The law of reflection (i = r) can be obtained using the theory of waves.

 Refraction of plane waves using Huygens theory: The law of refraction can be derived using Wave theory.  (Here v1 and v2 are the speed of light in media 1 and 2 with refractive indices and respectively).

 Relationship between frequency and speed: the frequency remains the same when the light passes from one medium to another.  The speed of a wave is given by v
 Where is the wavelength of the wave and the period of oscillation.

 Doppler effect: each time there is a relative movement between the source and the observer, the apparent frequency of the ligt obtained by the observer is different from the actual frequency emitted by the light source.  This effect is called the Doppler light effect.  The effect can be used to measure the speed of a recurring object.
 Frequency change: for a source moving away from the observer and a source moving towards the observer, a frequency change is
 So, finally,

 Consistent and inconsistent addition of waves:
 Coherent sources: - Two light sources which continuously emit light waves of the same frequency (or wavelength) with a zero or constant phase difference between them are called coherent sources.
 Indivisible source: - Two light sources which do not emit light waves with constant phase difference are called incompatible sources.
 The total intensity I is not the sum of the individual intensities I1 and I2 due to only two sources, but an intermediate term composed of -

 The mean interference term over several cycles is zero if
 Sources have different frequencies or
 The sources have the same frequency but no constant phase difference.
 For these relevant sources -
 According to the theory of superpositions, when two or more wave movements cross through a medium, a new wave is formed, causing a displacement due to the individual waves at that time.
 The average of the total intensity will be the difference of the underlying phase between the two superimposed waves.
 The importance is that the intensity due to the two light sources is not equal to the sum of the intensity due to each of them.
 The resulting intensity depends on the relative location of the point of the two sources, because changing it changes the path difference when we pass from one point to another.
 Therefore, the resulting intensity will vary between the maximum and minimum values, which is determined by the maximum and minimum values ​​of the cosine function.  It would be
 Young's experience
 Two parallel and very close slits S1 and S2 (illuminated by another narrow slit) behave like two coherent sources and produce a pattern of dark and bright bands on a screen called interference fringes.

 Polaroids: Polaroids are thin commercial sheets that use the property of selective absorption to produce an intense beam of plane polar light.
 Uses of Polaroids - in sunglasses and camera filters, in air screens, in airplane windows, LCD screens, etc.
 CBSE Class 12 Revision Notes and Key Points
 Wave Optics Class 12 Notes.  The CBSE quick review notes for class 12 in physics, chemistry, math, biology and other subjects are very useful for reviewing the entire program on exam days.  The revision notes cover all the important formulas and concepts given in the chapter.  Even if you want to view a chapter, the quick review notes are there for you.  These notes will certainly save you time during stressful exam days.

Importance of PW Notes for Class 12 Physics

Wave Optics Class 12 Important Questions Very Short Answer Type

Question 1.
How does the fringe width of interference fringes change, when the whole apparatus of Young’s experiment is kept in a liquid of refractive index 1.3? (Delhi 2008)

Fringe width becomes yL times of its initial value.

Question 2.
How does the angular separation of interference fringes change in Young’s experiment, if the distance between the slits is increased? (Delhi 2008)

When separation between two slits is increased, angular separation decreases.

Importance of PW Class 12 Physics Ch 10 Wave Optics Notes

Study material for your Class 12 Physics exam? Look no further than the NCERT Solutions for Chapter 10 – Wave Optics! These solutions are totally free to download and will give you all the answers you need to ace your exams. Plus, you can also find previous years’ question papers, sample papers, syllabus, and NCERT textbooks on PW website. With MCQs, exemplary problems, worksheets, and exercises, these solutions will help you understand the topic clearly and score great marks on your exams. So why wait? Download the NCERT Solutions for Class 12 Physics Chapter 10 now and get started on your path to success! 

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  1. Not able to open handwritten notes of 12th physics ray optics,wave optics,electric current and electric potential

    1. We Updates Notes .... Now you can Read Chapter notes and References books on this Website