Class 10 Physics Chapter 3 Short Notes

Complete Notes on Chapter No.12:  physics class 10 chapter 3 short notes in 10th Class Physics English Medium written by Mr. Adnan Haider. These computerized notes are very helpful in the preparation of physics class 10 chapter 3 short notes for students of the 10th class Physics and these are according to the paper patterns of all Punjab boards.

• Important physics class 10 chapter 3 mcqs for all students of Punjab  Textbook Board.
• Geometrical Optics Exercise Multiple Choice Questions ( MCQs ) with correct Answers
• Geometrical Optics Exercise Short Questions with Answers.
• Important physics mcqs for class 10 chapter 3 for all students of Punjab  Textbook Board.
• What do you understand by the Reflection of light?
• Describe the following terms used in Reflection: (i) Normal (ii) Angle of Incidence (iii) Angle of Reflection
• State Laws of Reflection?
• Define Refraction of Light.
• Define the following terms used in refraction: (i) Angle of incidence (ii) Angle of refraction
• Important physics class 10 chapter 3 important questions for all students of Punjab  Textbook Board.
• What is meant by the Refractive index of a material?
• State the conditions for Total Internal reflection.
• What are Optical Fibres?
• How does a converging lens form a virtual image of a Real object? How does a diverging lens can form a real image of a Real object?
• Define the Power of a lens and its Units.
• Important class 10 physics chapter 3 important questions for all students of Punjab  Textbook Board.
• What are the Differences between Resolving Power and Magnifying Power?
• What is meant by the terms Nearsightedness and Farsightedness? How can these defects be corrected?
• Define Lens.
• Important class 10 physics chapter 3 exercise solutions for all students of Punjab  Textbook Board.
• Why the position of the fish inside the water seem to be at less depth than that of its actual position?
• Define Endoscopy.
• Why or why not concave mirrors are suitable for makeup?
• Important physics class 10 chapter 3 full explanation for all students of Punjab  Textbook Board.
• Difference between a telescope and a microscope?
• Define Light Pipe.
• Define Prism. 
• Define Accommodation.
• Important 10th class physics chapter 3 important questions for all students of Punjab  Textbook Board.
• Define Mirror Formula or Lens Formula.
• Define Spherical Mirror.
• Difference between Regular and Irregular Reflection?
• Define Snell’s Law and write its formula.
• Important 10th class physics chapter 3 mcqs for all students of Punjab  Textbook Board.
• Find the focal length of the convex lens if its power is 5D. 
• Radius of Curvature (R):  It is the radius of the sphere of which spherical mirror is a part.
• Principal Axis: It is the line joining centre of curvature and pole of the spherical mirror.
• Important mcqs of physics class 10 chapter 3 for all students of Punjab  Textbook Board.
• The Principal focus (F): After reflection from a concave mirror, rays of light parallel to the principal axis converge to a point F. This point is called “The Principal Focus” of the mirror. Hence, Concave mirrors are also called converging mirrors. Since rays actually pass through this point, therefore, it is called real focus.
• Important mcqs test of physics class 10 chapter 3 for all students of Punjab  Textbook Board.
• Focal length ( f ): It is the distance from the pole to the principal focus measured along the principal axis. The focal length is related to the radius of curvature by f =R/2. This means that as the radius of curvature is reduced, so too is the focal length of the reflecting surface.
• Convex Mirror: The Focus lies behind the mirror.
• Important 10 class physics chapter 3 mcqs for all students of Punjab  Textbook Board.
• The focus is virtual as the rays of light after reflection appear to come from the focus.
• Concave Mirror: The focus is in front of the mirror.
• The focus is virtual as the rays of light after reflection appear to come from the focus.
• Important class 10 physics chapter 3 mcqs with answers for all students of Punjab  Textbook Board.
• Reflection of Light by Spherical Mirrors: Like plane surfaces, spherical surfaces also reflect light following the two laws of reflection as stated for plane surface.
• IMAGE LOCATION BY SPHERICAL MIRROR FORMULA: How can we tell about the nature of image (whether image is real or imaginary, inverted or erect) formed in a mirror? How can we tell about the size of the image compared with the size of the object? To answer these questions, one method is graphical or ray diagram. But, we can also answer these questions by using a mathematical formula called the mirror formula defined as:
• Important 10th class physics chapter 3 mcqs solved for all students of Punjab  Textbook Board.
• "Mirror formula is the relationship between object distance p, image distance q from the mirror and focal length f of the mirror". Thus we can write mirror formula as: 1 / f = 1 / p + 1 / q    Equation, is true for both concave and convex mirrors.
• Important class 10th physics chapter 3 important notes for all students of Punjab  Textbook Board.