Reflection of Light from Spherical MirrorIntroduction : There are two types of spherical mirrors:Concave mirror :    Convex mirror : Some terms associated with spherical mirrors. Aperture. The diameter of the circular rim of the mirror. In diagram AB is…

Law of Conservation of MomentumAccording to law of conservation of momentum “if there is no force acting on a system, the momentum of the system remains unchanged.”Generalizing the situation ” if a group of bodies are exerting force on each other, their…

What are the Non Conventional Energy Resources?Electrical energy cannot be created. It must be transformed from other forms of energy.The resources of energy to generate electricity can be classified as: (a) Renewable energy resource or Non conventional …

How is Focal Length related to Radius of Curvature?Mirror formula Definition : The equation relating the object distance (u) the image distance (v) and the mirror focal length (f) is called the mirror formula. \(\frac { 1 }{ v } +\frac { 1 }{ u } =\frac…

To Construct Optical Devices Using LensesTo Construct a Compound MicroscopeThe materials required for the construction of a compound microscope: (a) A convex lens with a power of +20 D (f0 = 5.0 cm) and a large diameter is used as the objective lens. (b)…

What is Thermal Equilibrium?Thermal Equilibrium What happens when cold milk is poured into a cup of hot coffee? The cold milk warms up while the hot coffee cools down. After some time, they are at a state known as thermal equilibrium. At thermal equilib…

What are the Conventional Energy Resources?The demand for energy is always increasing as the human population grows and our lives become more and more sophisticated. A large portion of the energy we use is in the form of electricity.Electricity is needed…

Oersted Experiment on Magnetic Effect of CurrentOersted ExperimentArrangement : A straight wire AB is connected to a battery V and key K. The wire is held horizontally over a magnetic needle. Working : When key is closed, current flows in the wire in th…

What is Reflection of Light?Light rays travel in a straight line. A ray is a very narrow beam of light. An object can only be seen when light rays from the object enter our eyes. These light rays can come directly from the object or as a result of the o…

What is the Ohm’s law?The proportional relationship of the potential difference between the ends of an ideal conductor and the current passing through it is known as Ohm’s law.Ohm’s law states that the current passing through an ideal conductor is direc…