Physics NCERT Exemplar Solutions Class 12th Chapter Nine Ray Optics And Optical Instruments

Physics NCERT Exemplar Solutions Class 12th Chapter Nine 2025 ( Physics NCERT Exemplar Solutions Class 12th Chapter Nine )

Pallavi Pathak
Updated on Jul 24, 2025 14:53 IST

By Pallavi Pathak, Assistant Manager Content

Physics NCERT Exemplar Solutions Class 12th Chapter Nine Ray Optics And Optical Instruments offers great preparation material for the Class 12 Board exams. It contains various types of questions, including multiple-choice questions, short-answer type questions, very short-answer type questions, and long-answer type questions. These questions cover all key concepts of Chapter Nine, and students' understanding of these concepts improves while practicing them. Students understand how and when to apply the concepts and formulas while solving complex problems during the exam.
Students can also download the Ch 9 Maths Class 12 PDF from here and study it anywhere without the requirement of any internet connection. The PDF is created by Shiksha's subject matter experts. The solutions given here are highly reliable and accurate. It is given in a step-by-step manner, which helps students to understand how to solve the problem.
Students can also check the NCERT solutions given on Shiksha's page. To have a better understanding of Class 12 Physics Chapter 9, they must also read Class 12 Physics Chapter 9 Ray Optics and Optical Instruments.

Table of content
  • Download PDF of NCERT Exemplar Class 12 Physics Chapter Nine Ray Optics And Optical Instrument
  • Important Formulas Related to Physics Chapter Nine NCERT Exemplar
  • NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments Short Answer Type Questions
  • NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments – Very Short Answer Type Questions
  • NCERT Exemplar Class 12 Physics Chapter Nine Long Answer Type Questions
  • NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments Objective Type Questions
  • FAQs Related to Physics Chapter Nine NCERT Exemplar
  • JEE Mains 2022
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Physics NCERT Exemplar Solutions Class 12th Chapter Nine Logo

Download PDF of NCERT Exemplar Class 12 Physics Chapter Nine Ray Optics And Optical Instrument

One of the best things is that the PDF of NCERT Exemplar Class 12 Physics Chapter Nine, once downloaded, can be accessed from anywhere without any internet connection. The students can read it while traveling and even if they are at a remote location. The PDF is well structured and neatly arranged, and contains all types of questions from very short, short, long, and objective types. The questions are concept and application-based, which deepens students' understanding of important topics like refraction, reflection, mirrors, lenses, and optical instruments. The PDF is ideal for preparing for various entrance exams like NEET and JEE. The PDF is available in a printable format. Students can also get the printout and practice on paper. Preparation from the NCERT Exemplar PDF boosts students' exam confidence.

Physics NCERT Exemplar Solutions Class 12th Chapter Nine Logo

Important Formulas Related to Physics Chapter Nine NCERT Exemplar

The following are the important formulas related to Class 12 Chapter 9 Physics:

Mirror Formula

1 f = 1 v + 1 u Lens Formula

1 f = 1 v 1 u Magnification by Mirror

m = v u Magnification by Lens

m = v u Lens Maker’s Formula

1 f = ( μ 1 ) ( 1 R 1 1 R 2 )

Total Internal Reflection Condition

θ > θ c ,  where  θ c = sin 1 ( n 2 n 1 )

Power of a Lens (in diopters)

P = 100 f ( in cm ) = 1 f ( in m )

Angular Magnification (Simple Microscope)

M = 1 + D f Magnifying Power of Compound Microscope

M = m o × m e = ( L f o ) ( 1 + D f e ) Magnifying Power of Astronomical Telescope (Normal Adjustment)

M = f o f e

Physics NCERT Exemplar Solutions Class 12th Chapter Nine Logo

NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments Short Answer Type Questions

Find below the answer:

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Commonly asked questions
Q:  

A circular disc of radius R is placed co-axially and horizontally inside an opaque hemispherical bowl of radius a (figure). The far edge of the disc is just visible when viewed from the edge of the bowl. The bowl is filled with transparent liquid of refractive index μ. and the near edge of the disc becomes just visible. How far below the top of the bowl is the disc placed?

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Q:  

A short object of length L is placed along the principal axis of a concave mirror away from focus. The object distance is u. If the mirror has a focal length f what will be the length of the image? You may take L << |v – f |.

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Q:  

A thin convex lens of focal length 25 cm is cut into two pieces 0.5 cm above the principal axis. The top part is placed at (0, 0) and an object is placed at (-50 cm, 0). Find the coordinates of the image.

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Physics NCERT Exemplar Solutions Class 12th Chapter Nine Logo

NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments – Very Short Answer Type Questions

Here are the solutions:

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Commonly asked questions
Q:  

Will the focal length of a lens for red light be more, same or less than that for blue light?

Q:  

The near vision of an average person is 25 cm. To view an object with an angular magnification of 10, what should be the power of the microscope?

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Q:  

An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens is reversed?

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NCERT Exemplar Class 12 Physics Chapter Nine Long Answer Type Questions

See below the solutions:

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Commonly asked questions
Q:  

Show that for a material with refractive index μ ≥ √2, light incident at angle shall be guided along, a length perpendicular to the incident face.

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Q:  

The mixture of a pure liquid and a solution in a long vertical column (i.e., horizontal dimensions << vertical dimensions) produces diffusion of solute particles and hence a refractive index gradient along the vertical dimension. A ray of light entering the column at right angles to the vertical is deviated from its original path. Find the deviation in travelling a horizontal distance d << h, the height of the column.

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Q:  

If light passes near a massive object, the gravitational interaction causes a bending of the ray. This can be thought of as happening due to a change in the effective refrative index of the medium given by n(r)=1+2GM/rc2 where r is the distance of the point of consideration from the centre of the mass of the massive body, G is the universal gravitational constant, M the mass of the body and c the speed of light in vacuum. Considering a spherical object find the deviation of the ray from the original path as it grazes the object.

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NCERT Exemplar Class 12 Physics Ray Optics And Optical Instruments Objective Type Questions

Here are the questions and solutions:

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Commonly asked questions
Q:  

A ray of light incident at an angle d on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the prism is mad? of a material of refractive index 1.5, the angle of incidence is

(a) 7.5°     

(b) 5°     

(c) 15°     

(d) 2.5°

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Q:  

A‘ short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is

(a) Blue     

(b) Green       

(c) Violet     

(d) Red

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Q:  

An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus. The image

(a) Moves away from the lens with an uniform speed 5 m/s

(b) Moves away from the lens with an uniform acceleration

(c) Moves away from the lens with a non-uniform acceleration

(d) Moves towards the lens with a non-uniform acceleration

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FAQs Related to Physics Chapter Nine NCERT Exemplar

The following are the frequently asked questions related to NCERT Exemplar Ray Optics And Optical Instruments:

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Commonly asked questions
Q:  

A spherically symmetric charge distribution is considered with charge density varying

as ρ(r)={ρ0(34rR)forrRzeroforr>R

Where, r(r < R) is the distance from the centre O (as shown in figure). The electric field at point P will be:

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Q:  

Find the ratio of energies of photos product due to transition of an electron of hydrogen atom from its (i) second permitted energy level to the first level. and (ii) the highest permitted energy level to the first permitted level.

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Q:  

Given below are two statements.

Statement I : Electric potential is constant within and at the surface of each conductor.

Statement II : Electric field just outside a charged conductor is perpendicular to the surface of the conductor at every point.

In the light of the above statements, choose the most appropriate answer from the options given below.

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Physics NCERT Exemplar Solutions Class 12th Chapter Nine Exam

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