KCET Optics Weightage 2025

KCET Optics Weightage 2025: Optics is one of the significant chapters in the Physics section of the KCET examination. Among Part II of the Physics Syllabus, Wave Optics and Ray Optics contribute around 15% weightage to the KCET 2025 exam. The Wave Optics chapter carries 9% weightage and the Ray Optics chapter carries 8% weightage in the KCET 2025. Candidates planning to appear for KCET , can expect around 7 to 8 questions from both Ray Optics and Wave Optics.

Wave Optics topics include Introduction of the Wave Optics, Reflection/Refraction of Plane Waves, Seeing the Single-Slit Diffraction Pattern,  Interference of Light Waves/Young's experiment, Diffraction, Single Slit, Validity of Ray Optics, Hyugen’s Principle, Coherent/Incoherent Addition of Waves etc. Refraction, Total Internal Reflection, Refraction via Prism, Refraction at Spherical Surfaces/by Lenses, The Rainbow, Optical Instruments, Natural Phenomenon of Sunlight are some of the topics of KCET Ray Optics.

Students should prepare these chapters well as they carry good weightage in the KCET 2025 exam. Studying these chapters and answering the questions from these chapters in the exam can help the candidates fetch good marks in the exam. Wave optics has the highest weightage even among the other chapters in physics. To know the weightage of optics check the article here, also read the related aspects of these chapters.

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Expected KCET Optics Weightage 2025

Here is the optics weightage for both the physics chapters.

Also Check - KCET Subject Wise Syllabus

KCET Optics Weightage: Topics Included

Here are the topics that both the optics chapters carry for the KCET exam, check the table here for your reference.

Best Books for KCET 2025 Preparation

Here are the best books that applicants can refer to for their KCET physics preparation.

1. Fundamentals of Physics, By S Chand
2. Pradeep’s Fundamental Physics for class 11 & 12, By KL Gomber, KL Gogia
3. NCERT Class 11 and 12 Textbooks
4. Physics for Karnataka COMEDK & CET, By Thomson Press India Ltd
5. Physics 1st year PUC, By AS Govind

KCET 2025 Optics: Preparation Tips

KCET aspirants can check the tips here to make their preparation for the optics chapter easier.

1. Make sure that you do not skip any important principles and concepts in the chapters. Like Hyugen’s Principle in the wave optics chapters.
2. Skim through the chapters thoroughly and check if there are any diagrams and better explanations for the concepts like refraction through Prism, Refraction by Lens & spherical surfaces, etc. Explaining the concepts and drawing the diagrams if the syllabus has it can help you to fetch good marks from this chapter.
3. Do not skip any concept without paying attention to whether it is important or not. Make sure to cover all the concepts and have a good understanding of the concepts.
4. Write down the notes of the chapter and keep it safe with you for revision later on as the exam approaches. Writing down things also helps in keeping the concepts in mind for a longer time.
5. Inculcate a good study schedule for each subject for the KCET exam and make sure that you are familiar with the chapter weightage, important chapters and other things so that you can complete the chapter that has good weightage first and then take up the chapters with less weightage.
6. Lastly, go through the KCET physics sections in the previous year question papers and check the questions that were based on the optics chapter. Include this practice in the routine to understand the chapter better and even evaluate your performance.

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KCET Optics Previous Year Questions

The candidates can check the kind of types that were asked in the previous year's KCET exams for the optics chapter.

Ray Optics PYQ’s

1. For a point object, which of the following produces a virtual image in the air?

• Concave mirror
• Convex mirror
• Plano-convex mirror
• Biconvex lens

Correct Answer: A

2. For a given pair of transparent media, the critical angle for which colour is maximum?

• Green
• Red
• Blue
• Violet

Correct Answer: B

3. An Equiconvex lends made of glass of refractive index 3/2 and has a focal length of f in air. It is completely immersed in water of a refractive index of 4/3. The percentage change in the focal length is

• 400% increase
• 300% decrease
• 400% decrease
• 300% increase

Correct Answer: D

4. A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to ¾ of the angle of the prism. The angle of deviation is

• 39 degree
• 20 degree
• 30 degree
• 45 degree

Correct Answer: C

Wave Optics PYQ’s

1. When light progrates through a given homogeneous medium, the velocities of

• Primary wavefronts are larger than those of secondary wavelets
• Primary wavefronts are lesser than those of secondary wavelets
• Primary wavefronts are greater than or equal to those of secondary wavelets
• Primary wavefront and wavelets are equal

Correct Answer: D

2. An unpolarised light of intensity I is passed through two polaroids kept one after the other with their planes parallel to each other. The intensity of light emerging from the second polaroid is I/4. The angle between the pass axes of the polaroids is

• 45 degree
• 0 degree
• 60 degree
• 30 degree

Correct Answer: A

3. In case of Fraunhoffer diffraction at a single slit, the diffraction pattern on the screen is correct for which of the following statements?

• Central bright band having alternate dark and bright bands of decreasing intensity on either side
• Central dark band having uniform brightness on either side
• Central bright band having dark bands on either side
• Central dark band having alternate dark and bright bands of decreasing intensity on either side

Correct Answer: A

4. When a compact disc (CD) is illuminated by a small source of white light-coloured bands is observed. This is due to

• Diffraction
• Interference
• Reflection
• Scattering

Correct Answer: A

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The KCET-appearing candidates need to understand the weightage of every chapter so that they can prepare accordingly for the exam. The KCET aspirants can check the important details about the KCET optics chapter here on this page. If you are looking for admission into the top 20 private engineering colleges entrance exam and fees , you can just fill out the Common Application Form on our website. It is a single application form for admission into various universities. For more articles and updates on KCET 2025, stay tuned with CollegeDekho.