Optics - JEE Advanced Previous Year Questions with Solutions and Weightage

In JEE Advanced Physics, Optics is a very important topic, carrying a weightage of around 9-10% with 4-5 questions asked each year. Most of the questions are conceptual and formula based which focuses on Geometrical Optics. As Optics is a branch of physics, which deals with nature, sources, properties and effects of light. It is classified into Geometrical Optics (Ray optics) and Physical Optics (Wave optics).

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• Download JEE Advanced Syllabus 2025
• Download JEE Advanced 2024 Paper With Detailed Solutions
• JEE Advanced Previous Year Question Paper PDF Download

Listed below is the list of Optics questions with detailed solutions asked in JEE Advanced exam 2025:

Question 1 :

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Question 2:

A monochromatic light wave is incident normally on a glass slab of thickness as shown in the figure. The refractive index of the slab increases linearly from n1 to n2 over the height of h. Which of the following statements is/are true about the light wave emerging out of the slab?

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Question 3:

In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0.1 cm and the distance of its real image from the lens is 20 ± 0.2 cm. The error in the determination of focal length of the lens is ???? %. The value of ???? is ____ .

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Question 4:

A person of height 1.6 m is walking away from a lamp post of height 4 m along a straight path on the flat ground. The lamp post and the person are always perpendicular to the ground. If the speed of the person is 60 cm s−1, the speed of the tip of the person’s shadow on the ground with respect to the person is _______ cm s−1.

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Question 5:

A plane-polarized blue light ray is incident on a prism such that there is no reflection from the surface of the prism. The angle of deviation of the emergent ray is ???? = 60° (see Figure-1). The angle of minimum deviation for red light from the same prism is ????min = 30° (see Figure-2). The refractive index of the prism material for blue light is √3. Which of the following statement(s) is(are) correct?

• The blue light is polarized in the plane of incidence.
• The angle of the prism is 45°
• The refractive index of the material of the prism for red light is √2.
• The angle of refraction for blue light in air at the exit plane of the prism is 60°.

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Question 6:

A string of length 1m and mass 2 x 10-5 kg is under tension T. When the string vibrates two successive harmonics are found to occur at frequencies 750 Hz and 1000 Hz. The value of tension is ___ Newton.

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Question 7:

An optical arrangement consists of two concave mirrors M1 and M2, and a convex lens L with a common principal axis, as shown in the figure. The focal length of L is 10 cm. The radii of curvature of M1 and M2 are 20 cm and 24 cm, respectively. The distance between L and M2 is 20 cm. A point object S is placed at the mid-point between L and M2 on the axis. When the distance between L and M1 is n/7 cm, one of the images coincides with S. The value of ???? is _______.

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Question 8:

In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0.1 cm and the distance of its real image from the lens is 20 ± 0.2 cm. The error in the determination of focal length of the lens is ???? %. The value of ???? is ____ .

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Question 9:

A wide slab consisting of two media of refractive indices N1 and n2 is placed in air as shown in the figure. A ray of light is incident from medium n1 to n2 at an angle θ, where sinθ is slightly larger than 1 n1. Take refractive index of air as

Which of the following statement(s) is(are) correct?

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Question 10:

Three plane mirrors form an equilateral triangle with each side of length

L There is a small hole at a distance l>0 from one of the corners as shown in the figure A ray of light is passed through the hole at an angle θ and can only come out through the same hole The cross section of the mirror configuration and the ray of light lie on the same plane Which of the following statement(s) is(are) correct?

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JEE Advanced 2025 Exam Pattern

The JEE Advanced 2025 exam consists of two papers: Paper 1 and Paper 2. Both papers are compulsory and must be attempted by the candidates. The exam will be conducted online (computer-based).

Subject-wise Syllabus: JEE Advanced 2025

The JEE Advanced 2025 Subject-wise Syllabus covers crucial topics across Physics, Chemistry, and Mathematics, with each subject focusing on advanced concepts.

• Mathematics emphasizes Calculus and Algebra (accounting for up to 40% of the exam)
• Physics delves into Mechanics and Electrodynamics, while Chemistry includes topics like Physical Chemistry and Organic Chemistry.
• As observed from past data that Mathematics often carries the highest weightage, making it a critical area for focused preparation.

JEE Advanced Chapter-wise Weightage

The JEE Advanced chapter-wise weightage helps you understand which topics carry more importance in the exam. By focusing on high-weightage chapters, you can optimize your preparation. For example, in Mathematics, topics like Calculus and Algebra usually carry about 50-60% of the questions, while in Physics, Mechanics and Electromagnetism contribute significantly.

JEE Advanced Physics - Weightage and Important Topics

• Mechanics (particularly Kinematics and Laws of Motion) have a higher weightage, often constituting a major chunk of the Physics paper.
• Modern Physics, with topics like the Photoelectric Effect and Nuclear Physics, remains significant with high-scoring potential.
• Physical Chemistry and Organic Chemistry both have a large weightage. Topics like Chemical Kinetics and Reaction Mechanisms in Organic Chemistry are crucial and frequently asked.

JEE Advanced 2025: Subject-wise Weightage

• Mathematics holds the highest weightage, so mastering Calculus and Algebra is critical.
• Physics and Chemistry both have significant portions dedicated to Mechanics and Physical Chemistry, respectively.
• Regular practice of important topics like Modern Physics, Organic Chemistry, and Coordinate Geometry can help candidates maximize their scores in JEE Advanced 2025.

To find the Minimum Marks Required to Qualify JEE Advanced 2025, it's also important to understand the category-wise cutoff criteria set by the exam authorities.

Previous Years’ Question Paper

JEE Advanced 2024 Question Paper PDF

JEE Advanced 2023 Question Paper PDF

JEE Advanced 2022 Question Paper PDF

JEE Advanced 2021 Question Paper PDF

JEE Advanced 2020 Question Paper

Frequently Asked Questions:

Is optics important for the NEET UG exam 2025?

Yes, Optics is a significant portion of the JEE Advanced exam with 9-10% in the Physics paper and 4-5 questions every year. It includes Ray Optics and Wave Optics and is a scoring subject that covers Geometric optics, Lenses, Mirrors, and Diffraction.

Is JEE Advanced 2025 Tough?

The JEE Advanced 2025 is expected to be one of the most toughest exams for aspirants. To get admission in institutes like the IITs (Indian Institutes of Technology), IISc (Indian Institute of Science), and other top engineering colleges, JEE Advanced is known for its high level of difficulty.

Syllabus Complexity:

The JEE Advanced 2025 syllabus is extensive and covers a wide range of topics in Physics, Chemistry, and Mathematics. While some topics are foundational, others are highly difficult and require a deep understanding. The difficulty increases due to the complexity of questions and the syllabus.

Which is the hardest topic in the JEE Advanced exam ?

There are some JEE Advanced Physics topics that are considered tougher due to their lengthy problem-solving nature and conceptual toughness.

In Physics, students should focus on the following topics - Work, Power, Energy, Current Electricity, Laws of Thermodynamics, Electromagnetic Induction, Alternating Current, Magnetic Effects of Current, and Electrostatics.