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JEE Advanced Wave Optics Important Questions

Last updated date: 21st May 2024
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Important Questions of Wave Options in JEE Advanced

Students basically rate JEE Advanced Physics to be one of the most difficult and vast subjects. So, having a clear understanding of the concepts from the beginning itself will make students attempt the exam really well. Physics is an important subject within the branch of science subjects and also it is equally tough. The importance of Physics as a subject will not be minimized during the course of a student’s academic career. IIT JEE Advanced important questions from Wave optics will make it easier in preparation for the students.


JEE Advanced Important Questions


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JEE Advanced

Chapter Name:

Wave Optics

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English Medium



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Chapter-wise Important Questions with PDF

Master the Concepts of JEE Advanced Physics Wave Optics with Our Practice Papers

Want to improve your chances of success on the JEE Advanced Physics Wave Optics exam? Download our JEE Advanced Physics Wave Optics practice paper in PDF format. With targeted questions and in-depth solutions, you can identify and address any areas where you need improvement. Start practicing today and see the difference!

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How do These Topic Wise Articles Help in the Preparation?

The JEE Advanced is considered to be one of the toughest engineering entrance exams, not only in India but also in the world. Hence, it is no child's play to cover the entire syllabus and also, remember the minute little details that matter within a span of two years without proper strategies and segregation made in the syllabus. 

It is very important that students make a study plan that focuses on one chapter at a time and perfect it over a period of a few weeks and eventually some revision before the exam. Such a study plan ensures that students don't get overwhelmed by the humongous portion but rather take little steps towards the broader goal of getting into the IIT. These small targets also encourage them to study hard and tick little things off of their list rather than getting detoured looking at an onerous challenge, which eventually boosts their score.

In this chapter, you will understand the concepts of refraction and reflection in a detailed way. Waves from one point of a source will layout in all directions, whereas the light will be seen to travel along with narrow rays. The insight and experiment of Huygens, Young and Fresnel are required to analyze how a wave theory will describe all aspects of the behavior of light.


How Vedantu will help You Better Your Chances of Cracking JEE Advanced?

Vedantu provides students with various articles just like this one that focuses on one chapter at a time and helps the students perfect it in a manner that is sufficient for the level of JEE Advanced. There are tons of articles and documents available such as revision notes, chapter wise preparation notes, previous year question papers, mock question papers, formula sheets among many other things. All of these have been prepared by subject experts who are tremendously experienced and know the in’s and out’s of this exam. Thus, Vedantu is the perfect platform for students wanting to make it big in their academic careers!


Moving on to the agenda, it is of pivotal importance and absolutely essential for any student to have very strong fundamentals in Physics for students who wish to pursue a career in engineering be it mechanical, electrical or computers. Vedantu gives you all the JEE Advanced Wave Optics important questions with customized answers. Students can access them on the official website of Vedantu in the format of PDF and it is also available with free download option for the students to read, understand and assimilate in a format which is easy for them to learn. JEE Advanced wave optics important questions will benefit the students in their board examination as well.

FAQs on JEE Advanced Wave Optics Important Questions

1. According to the concepts in chapter Wave Optics, what is Phase Difference and what are the factors that determine it?

Phase difference, put simply is the difference between the phase angle of the two waves. This phase angle is present in the equation of a wave and hence if we know the equations of two waves, we can easily find the phase difference that exists between them. Some factors the phase difference depends upon are: Initial phase difference between the source of the two waves, the refractive index of the medium they are travelling in, presence of any reflections that may or may not take place, the difference in the path lengths of the waves from their respective sources.

2. What do you mean by Wave front and Wave normal after studying the chapter Wave Optics?

The locus of all the points in a given medium that vibrate/oscillate in the same phase is known as a wavefront, while wave normal, like the name suggests, is the perpendicular drawn to the surface of a wavefront at any point, which is same as the direction of propagation of light. A wave normal is nothing more than a simple ray of light. There are different shapes a waveform can have like a spherical, plane, or cylindrical and this shape depends on various factors like the lens used, and the medium.

3. What does the principle of Superposition state and how important is it according to the JEE Advanced exam?

There are plenty of types of questions that can be based upon the principle of superposition and they are often asked in both the main and advanced levels. The principle states that in a given medium, the number of waves travelling simultaneously behaves independently of each other and that the displacement of a particle can be found out at any given instant simply by adding the individual displacements due to all the travelling waves. Students are expected to memorise the displacement equation of a wave to solve the problems quickly and correctly in the exam.

4. Going by the concepts of Wave Optics, what are the important terminologies in Young’s Double Slit Experiment?

Young’s double experiment is one of the most important sub-topics of the Wave Optics chapter and students may pay special attention while studying it since questions can at times get tricky. A brief look at some keywords of the experiment can be listed as: 

Coherent sources: Any two sources that have zero (or constant) phase difference between them and that emit a monochromatic light continuously are known as coherent sources.

Fringes: The alternating pattern of bright and dark bands that are produced by the interference of light waves is known as a fringe.

Bright Fringe: The ‘bright’ spots in the fringe bands which are formed by the constructive interference of two superimposing waves are termed as bright fringes.

Dark Fringe: The ‘dark’ spots in the fringe bands which are formed by the destructive interference of two superimposing waves are known as dark fringes.

5. What are some essential formulas to remember in chapter Wave Optics for JEE Advanced?

Wave Optics consist of numerous important laws, principles, derivations and experiments and all of them warrant a huge number of formulas, each consisting of minute details and different cases of its own. We’ve listed some of the most frequently asked ones below:

Displacement equation of a wave: y R sin 2π/λ (vt+x/2)

Amplitude: R = 2a cos πx/λ

Intensity: I = K4a2 cos2 (πx/λ)    (I = KR2)

Condition for Constructive Interference:

Path difference = (2n)λ/2

Phase difference = (2n)π

Condition for Destructive Interference:

Path difference = (2n+1)λ/2

Phase difference = (2n+1)π

YDSE (Young's Double Slit Experiment):

Path difference, x = yd/D

Maxima, y = nλD/d

Here, n = 0,1,2,3….

Minima, y = (2n+1) λD/d

Here, n = 0,1,2,3….

Fringe Width: β = λD/d

Power of Lens: P = 100/f

We’ve hence covered not only some very important questions about wave optics that will help you in your preparation for the JEE Advanced but also some questions that our experts are frequently asked. Visit the Vedantu website for more such topic wise articles that will help strengthen your chances of making it to the IIT. Here’s wishing all the aspirants the best of luck in their endeavor.