Physics is the branch of science concerned with the nature and properties of matter and energy. The subject matter of Physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms. This is the scientific study of matter and energy and how they interact with each other.
If you place a ball on a flat surface, it will remain there until unless you disturb it. It will move only when either we push it or pull it. This push or pull acting on an object is known as a force. At least two objects must interact for a force to come into play. An interaction of one object with another object results in a force between the two objects.
In ancient times, the length of a foot, the width of a finger, and the distance of a step were commonly used as different units of measurements. In 1790, the French created a standard unit of measurement called the metric system. For the sake of uniformity, scientists all over the world have accepted a set of standard units of measurement. The system of units now used is known as the International System of Units (SI units).
Experiment: To determine the internal resistance of a galvanometer by half deflection method, and to convert it into a volt meter of a given range, say (0-3 V), and verify it.
Experiment: Determine the internal resistance of a primary cell using a potentiometer.
Experiment: To compare the refractive indices of two transparent liquids using a concave mirror and a single pin.
When the object is placed on the centre of curvature of the concave mirror, the real inverted image is formed at the centre of curvature (i.e. at the same point).
Experiment: Find the focal length of a convex mirror using a convex lens.
A convex mirror always forms virtual image of a real object and hence the value of v (i.e. the position of the image) cannot be obtained directly. Therefore, convex lens is used to enable us to form a real image due to the combination.
Experiment: To compare the frequencies of two tuning forks by finding the first and second resonance positions in a resonance tube.
Experiment: To find the time required to empty a burette, filled with water, to ½ of its volume, to ¼ of its volume, to 1/8 of its volume and so on. Then plot a graph between volume of water in the burette and time and thus study at each stage that the fractional rate of flow is same (analogy to radio-active decay).
Experiment: Determine the specific heat of a solid using the method of mixtures.
Specific heat: The amount of heat required for a unit mass of substance to raise its temperature by 1°C is defined as specific heat.
While waiting on a railway platform for the arrival of a train, you might have observed that the pitch of the whistle when the engine approaches you and when the engine moves away from you are different. The pitch is higher when the engine approaches but is lower when the engine moves away.
The 1960 invention of the laser (Light Amplification by Stimulated Emission of Radiation) completely revolutionized communication technology. The laser, which is a highly coherent source of light waves, can be used as an enormously high capacity carrier wave for information carrying signals (voice, data or video) transmitted through an optical wave guide, such as an optical fibre.
Page 1 of 6