Last Updated on April 12, 2025 by sanjjeett
Hello students, we are providing assertion and reasoning questions for ICSE class 10 physics. Assertion and reasoning questions are the new question format that is introduced in CISCE (ICSE and ISC) board. The resources for ICSE assertion and reasoning questions are very less. So, to help icse board students we have created chapterwise assertion and reasoning questions for class 10 physics. In this article, you will find assertion and reasoning questions for ICSE Class 10 Physics Chapter 4 Refraction of Light at Plane Surfaces.
| Chapter | Refraction of Light at Plane Surfaces |
| Type of Questions | Assertion and Reasoning Questions |
| Nature of Questions | Competency Based Questions |
| Board | ICSE |
| Class | 10 |
| Subject | Physics |
| Unit | Unit 2 Light |
| Useful for | Class 10 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | ICSE Class 10 Physics Chapterwise Assertion Reasoning |
Assertion and Reasoning Questions on Refraction of Light at Plane Surfaces for ICSE Class 10 Physics
Assertion and reasoning questions are also known as assertion reason questions. Assertion-Reason questions are a type of question format used in ICSE exams where two statements are provided: an Assertion (A) and a Reason (R). Students need to determine whether each statement is true or false and if the Reason correctly explains the Assertion.
Q1. Assertion (A): Light bends when it travels from air to glass.
Reason (R): Light changes its speed when it enters a different medium.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q2. Assertion (A): A ray of light entering a denser medium bends away from the normal.
Reason (R): In a denser medium, the speed of light increases.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (d)
Q3. Assertion (A): The refractive index of air is greater than that of glass.
Reason (R): Light travels faster in air than in glass.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (c)
Q4. Assertion (A): A coin placed under water appears to be at a greater depth.
Reason (R): Due to refraction, the coin appears raised from its original position.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (d)
Q5. Assertion (A): In refraction, the angle of incidence is always equal to the angle of refraction.
Reason (R): Refraction follows Snell’s Law.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (c)
Q6. Assertion (A): The emergent ray from a glass slab is parallel to the incident ray.
Reason (R): Lateral displacement occurs due to change in direction at both surfaces of the slab.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q7. Assertion (A): Refractive index has no units.
Reason (R): It is a ratio of two similar quantities (speeds or sines).
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q8. Assertion (A): The emergent ray from a glass slab is always in the same direction as the incident ray.
Reason (R): The emergent ray is a result of two refractions which cancel out the bending.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q9. Assertion (A): The lateral shift in a glass slab is more when the angle of incidence increases.
Reason (R): At higher angles, the path difference between the refracted and emergent ray increases.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q10. Assertion (A): When a ray travels from water to air, it bends towards the normal.
Reason (R): Light travels slower in air than in water.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (d)
Q11. Assertion (A): The refractive index of a medium can never be less than 1.
Reason (R): Refractive index is the ratio of speed of light in vacuum to speed in the medium.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
Q12. Assertion (A): Apparent depth is less than real depth when viewed from denser to rarer medium.
Reason (R): Due to refraction, the light bends away from the normal at the interface.
(a) Both assertion and reason are true.
(b) Both assertion and reason are false.
(c) Assertion is false but reason is true.
(d) Assertion is true but reason is false.
✅ Correct Option: (a)
We hope the given ICSE assertion reasoning questions for Refraction of Light at Plane Surfaces helps you in your learning.
Also check
- Spectrum Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 6
- Refraction Through a Lens Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 5
- Refraction of Light at Plane Surfaces Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 4
- Machines Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 3
- Force Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 1
- Work, Energy and Power Assertion and Reasoning Questions for ICSE Class 10 Physics Chapter 2
Topics from which assertion reasoning questions may be asked
- Refraction of light – definition and basic explanation
- Laws of refraction
- Refractive index and its formula
- Absolute and relative refractive index
- Refraction through glass slab – lateral displacement
- Speed of light in different media
- Real and apparent depth
- Conditions for no refraction
- Principle of reversibility of light
- Ray diagrams for refraction and lateral shift
Assertion and reasoning questions based on above topics may be asked.
Topics found difficult by students
- Diagram of refraction from denser to rarer medium to show the formation of an image.
- Completing the path of a ray through 30°, 60° and 90° prism.
- Refraction through any refracting medium when opposite faces are parallel and when they are not parallel.
- Factors affecting critical angle and conditions for total internal reflection.
- Total internal reflection through right angled isosceles prism.
These are the topics from chapter Machines, generally found difficult by students studying in ICSE Class 10 Physics.
Frequently Asked Questions (FAQs) on Machines ICSE Class 10 Physics Assertion and Reasoning Questions
Q1: What are Assertion and Reasoning questions?
A1: Assertion and Reasoning questions are a type of question format used in ICSE exams where two statements are provided: an Assertion (A) and a Reason (R). Students need to determine whether each statement is true or false and if the Reason correctly explains the Assertion.
Q2: How do Assertion Reasoning questions differ from other question types?
A2: Unlike multiple-choice questions, Assertion-Reason questions require students to analyze the relationship between two statements. It’s not just about knowing the facts but understanding how they connect logically.
Q3: What steps should I follow to correctly answer Assertion and Reasoning questions?
A3: Follow these steps:
Read both statements carefully. Understand what each statement is saying.
Determine the truth value of each statement. Decide if each statement is true or false independently.
Analyze the relationship. If both statements are true, decide whether the Reason (R) correctly explains the Assertion (A).
Choose the correct option. Based on your analysis, select the appropriate answer from the given options.
Q4: What options are typically provided for Assertion and Reasoning questions?
A4: The typical options are:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.
Q5: What should I check to determine if the Reason correctly explains the Assertion?
A5: Ensure that the Reason provides a logical explanation for the Assertion. Check if the Reason directly addresses the cause or basis of the Assertion and if they are contextually linked.
Q6: How can I improve my skills in answering Assertion and Reasoning type questions?
A6: Practice regularly with sample questions and past papers. Focus on understanding the concepts thoroughly rather than rote memorization. Analyzing how different facts and concepts interrelate will enhance your ability to correctly answer these questions.
Q7: What are common mistakes to avoid when answering Assertion and Reasoning questions?
A7: Common mistakes include:
Not reading the statements carefully and missing key details.
Assuming the Reason explains the Assertion without checking the logical connection.
Confusing the order or relationship between the statements.
Overthinking and adding information not provided in the question.
Q8: What resources can help me practice Assertion and Reasoning questions for ICSE Class 10 Physics?
A8: Use study guides specifically designed for Assertion-Reason questions. Online educational platforms and reference books for ICSE Class 10 Physics also offer practice questions and explanations. xamcontent.com/cisce also provides assertion reason questions for ICSE Class 10 Physics.
