Lakhmir Singh Solutions for Class 10 Physics Chapter 4 Reflection of Light
By Ankit Gupta
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Updated on 2 May 2025, 16:06 IST
Physics is all around us, and light is one of the most fascinating parts of it. From seeing our reflection in a mirror to the working of cameras, the concept of light plays a very important role in our daily lives. In Class 10 Physics, Chapter 4 of the Lakhmir Singh textbook focuses on one of the key concepts of optics – the Reflection of Light. Understanding this chapter is not only important for scoring good marks in exams, but it also helps us understand how light behaves and how many of the optical devices we use every day actually work.
The Lakhmir Singh Solutions for this chapter have been created to help students clearly understand the concepts in a simple and easy-to-follow way. Each question in the textbook is explained with detailed answers, step-by-step solutions, and relevant examples. This helps students build a strong foundation in the topic and prepare confidently for their board exams. These solutions are very helpful for students who want to revise quickly or practice questions that may be asked in their final exams.
In Chapter 4 – Reflection of Light, students learn about important topics such as the laws of reflection, types of mirrors, image formation by concave and convex mirrors, ray diagrams, and uses of mirrors in real life. The chapter also introduces key terms like incident ray, reflected ray, normal, angle of incidence, and angle of reflection. Lakhmir Singh’s book explains all these topics with the help of neat diagrams, simple language, and easy-to-understand examples.
The solutions also cover numerical problems and conceptual questions that often confuse students. By going through these solutions, students can learn how to approach different types of questions and improve their problem-solving skills. It also builds their confidence in attempting similar questions in the board exams.
Whether you're trying to understand the basics of reflection or preparing for a school test or board exam, these Lakhmir Singh Solutions act as a valuable guide. They are designed to make learning Physics enjoyable and stress-free. So, take your time, go through each solution, practice regularly, and soon you’ll master the concept of light reflection with ease!
Download Lakhmir Singh Solutions for Class 10 Physics Chapter 4 Reflection of Light PDF Here
Lakhmir Singh Class 10 Chapter 4 PDF includes detailed solutions, examples, and extra questions to help you master real numbers and other topics. Click here to download the Lakhmir Singh Class 10 Chapter 4 PDF.
Access Answers to Lakhmir Singh Solutions for Class 10 Physics Chapter 4 Reflection of Light
Q1. What happens when a ray of light hits a plane mirror straight on?
Answer: When light hits a plane mirror directly (at 0° angle), the angle of incidence is zero. According to the law of reflection, the angle of reflection is also zero. So, the light bounces back along the same path.
Q2. A ray of light hits a plane mirror at an angle of 30 degrees. What is the angle of reflection?
Answer: The angle of reflection is also 30 degrees, as the angle of incidence equals the angle of reflection.
Q3. A ray of light hits a plane mirror at 40 degrees to the mirror's surface. What is the angle of reflection?
Answer: If the ray makes 40 degrees with the mirror surface, then the angle of incidence is 90 - 40 = 50 degrees. So, the angle of reflection is also 50 degrees.
Q4. A ray of light falls straight (normally) on a plane mirror. What will be:
a) angle of incidence
b) angle of reflection
Answer: a) 0 degree
b) 0 degree
Q5. What type of image is formed:
a) in a plane mirror
b) on a cinema screen
Answer: a) Virtual image
b) Real image
Q6. What kind of mirror forms a virtual image that is the same size as the object?
Answer: A plane mirror forms a virtual image of the same size.
Do Check: Lakhmir Singh Solutions for Class 10
Q7. What is it called when the right side of an object looks like the left side in a mirror?
Answer: This is called lateral inversion.
Q8. What is the name of the effect when writing with the right hand in front of a mirror looks like writing with the left hand?
Answer: This effect is known as lateral inversion.
Q9. If an object is kept 10 cm in front of a plane mirror, how far is it from its image?
Answer: The image is also 10 cm behind the mirror. So, the total distance between the object and its image is 10 cm + 10 cm = 20 cm.
Q10. What property of light causes a pencil to cast a shadow when held in front of a light?
Answer: Light travels in a straight line, which is why shadows are formed.
Q11. Why can’t the image seen in a plane mirror be shown on a screen? What is this type of image called?
Answer: Because the image cannot be caught on a screen, it is called a virtual image.
Q12. Fill in the blank: When light is reflected, the angles of incidence and reflection are ______.
Answer: Equal
Q13. True or False: A student says we see objects because light comes from our eyes and bounces back from the object.
Answer: False
Q14. Where is the image located when you see something in a mirror?
Answer: The image appears behind the mirror.
Q15. A ray of light hits a plane mirror with an angle of incidence of 30 degrees. What is the angle between the reflected ray and the mirror surface?
Answer: The angle of reflection is 30 degrees. So, the angle between the reflected ray and the mirror surface is 90 - 30 = 60 degrees.
Q16. What is the difference between a real image and a virtual image? Give one example of each.
Answer: A real image can be seen on a screen, while a virtual image cannot. Example of real image: image on a cinema screen. Example of virtual image: image in a plane mirror.
FAQs on Lakhmir Singh Solutions for Class 10 Physics Chapter 4 Reflection of Light
What does Chapter 4 – Reflection of Light in Lakhmir Singh's Class 10 Physics cover?
This chapter explains how light reflects off surfaces. It covers important concepts like the laws of reflection, types of mirrors (plane, concave, convex), image formation using ray diagrams, and the real-life applications of these concepts. It also introduces terms like incident ray, reflected ray, angle of incidence, and angle of reflection.
Why should I refer to Lakhmir Singh Solutions for Chapter 4?
The solutions offer clear, step-by-step explanations for every question in the textbook. They help in building strong conceptual understanding, make revision easier, and improve problem-solving skills. These solutions are also helpful for quick practice before exams.
Are the Lakhmir Singh solutions enough for exam preparation for Chapter 4?
Yes, for most students, Lakhmir Singh Solutions are sufficient for scoring well in exams. The book covers NCERT-based questions, numerical problems, and conceptual exercises that are frequently asked in board exams. However, additional practice from sample papers or previous year’s questions can be helpful.
Do the solutions include ray diagrams and explanations for mirror-based questions?
Absolutely. The solutions include detailed ray diagrams and simple explanations for image formation by plane, concave, and convex mirrors. These diagrams help students visualize and understand how light behaves when it hits different mirrors.
Can these solutions help in understanding numerical problems in the chapter?
Yes, the solutions provide step-by-step methods to solve numerical problems related to mirror formulas and image distance. They explain how to apply the correct formula and calculate values accurately, which is very helpful during exams.
Where can I find Lakhmir Singh Solutions for Class 10 Physics Chapter 4?
You can find these solutions in physical guidebooks, online educational platforms, and PDF downloads provided by various edtech websites. Some websites even offer them for free to help students prepare better.