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Chapters
2: Force and Pressure
▶ 3: Light
4: Heat
5: Electricity
6: Sound
7: Magnetism
8: Universe and Space Science
9: Matter around us
10: Changes around us
11: Air
12: Atomic Structure
13: Water
14: Acids and Bases
15: Chemistry in Everyday Life
16: Microorganisms
17: Plant Kingdom
18: Organisation of Life
19: Movements in Animals
20: Reaching the Age of Adolescence
21: Crop Production and Management
22: Conservation of Plants and Animals
23: Libre Office Calc
![Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 3 - Light - Shaalaa.com](/images/science-english-class-8-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 3 - Light")
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Solutions for Chapter 3: Light
Below listed, you can find solutions for Chapter 3 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 8 TN Board.
Samacheer Kalvi solutions for Science [English] Class 8 TN Board 3 Light Exercises [Pages 33 - 34]
Choose the best answer.
Which of the following has curved reflecting surface?
plane mirrors
spherical mirrors
simple mirrors
None of the above
The spherical mirror with a reflecting surface curved inward is called
convex mirror
concave mirror
curved mirror
None of the above
The spherical mirror used as a rear view mirror in the vehicle is
concave mirror
convex mirror
plane mirror
None of the above
The imaginary line passing through the centre of curvature and pole of a spherical mirror is called
centre of curvature
pole
principal axis
radius curvature
The distance from the pole to the focus is called ______.
pole length
focal length
principal axis
None of the above
If the image and object distance is same, then the object is placed at
infinity
at F
between f and P
At C
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
10 cm
5 cm
20 cm
15 cm
Fill in the blanks.
The spherical mirror used in a beauty parlour as make-up mirror is _______.
Geometric centre of the spherical mirror is ______.
Nature of the images formed by a convex mirror is _______.
The mirror used by the ophthalmologist to examine the eye is _______.
If the angle of incidence is 45°, then the angle of reflection is ________.
If an object is placed between two mirrors which are parallel to each other, the number of images formed is ______.
Match the following.
| Convex mirror | Radio telescopes |
| Parobolic mirror | Rear – view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |
Answer briefly.
Define focal length.
Give any two applications of a concave and convex mirror.
Define the refractive index of a medium.
State Snell’s law of refraction
Explain the images formed by a concave mirror.
Answer in detail.
What is reflection? Write a short note on regular and irregular reflection.
Explain the working of a periscope.
What is dispersion? Explain in detail.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
Numerical problem.
If two plane mirrors are inclined to each other at an angle of 45°, find the number of images formed.
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
Solutions for 3: Light
Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 3 - Light
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 8 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 8 TN Board Tamil Nadu Board of Secondary Education 3 (Light) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Science [English] Class 8 TN Board chapter 3 Light are Light, Mirrors, Spherical Mirrors, Images Formed by Spherical Mirrors, Convex Mirror, Law of Reflection of Light, Types of Reflection, Multiple Reflections, Introduction to Refraction of Light, Dispersion of Light Through Prism and Formation of Spectrum, Concave Mirror, Refractive Index, Prism.
Using Samacheer Kalvi Science [English] Class 8 TN Board solutions Light exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 8 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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