Images formed by convex and concave lenses
The lens which is thick in the middle and thin at the edges is called a convex lens whereas the lens which is thin in […]
Physics
Terminologies related to lens and Rules for drawing ray diagrams
1. Center of curvature (2F or C): The center of the sphere from which the lens has been cut is called the center of curvature […]
Forces in action
Force is any interaction that changes or tends to change the state of rest or of uniform motion or the shape and size of a […]
Energy crisis and conservation of energy
Energy crisis: • The problem that arises when the consumption of energy is very high and the available sources are limited is called energy crisis […]
Sources of energy and their uses
• The chief sources of energy in order of importance are fossil fuels, hydropower and nuclear energy. • In addition, solar energy, wind energy, tidal […]
Energy and the Sun (The ultimate source of energy)
We need energy to perform a wide range of activities. Hence, energy is defined as the capacity or ability to do work. It is measured […]
Differences between Heat and Temperature
S.N. Heat Temperature 1. The total kinetic energy produced by the vibration of all the molecules in a substance is called its heat content. The […]
Differences between Convex lens and Concave lens
S.N. Convex lens Concave lens 1. A lens which is thick (bulged) in the middle but thin (tapered) at the edges is called convex lens. […]
Newton’s laws of motion
Sir Isaac Newton (1642-1727): Sir Isaac Newton, an English scientist, enunciated the basic laws of motion. He was born at Woolsthrope, Lincolnshire, England on the […]
Pressure (Practical applications of liquid pressure)
The pressure given by a force is directly proportional to its magnitude, i.e. Pressure (P) α Force (F) ………………………… (i) Similarly, the pressure given by […]