We can see the objects around us with the help of eyes and light plays a major role in enabling us to see the world around us. The human eye can be considered an optical instrument that enables us to see. The human eye consists of the cornea, which is a transparent structure that helps […]
Refraction is defined as the bending of the wave when it enters a medium where its speed is different. Refraction of light is one such phenomenon. According to laws of refraction of light, the incident ray, the refracted ray and the normal are all in the same plane. Also, the ratio between the sine of […]
Reflection of light is the phenomenon in which the light rays strike the surface and bounce back. The incident ray is the light ray that falls on the surface and the reflected ray is the light that bounces off the surface. The laws of reflection are used for determining the reflection of incident rays on […]
There are different sources of energy that are used worldwide for the generation of power. These sources of energy are broadly classified into two types and they are renewable energy and non-renewable energy. There are many countries that are dependent on fossil fuels as their source of energy. Fossil fuels are non-renewable sources of energy […]
We know that magnetism and electricity are two separated yet interconnected concepts when it comes to electromagnetic force. When these two concepts are brought together they form the basis for electromagnetism. A moving electric charge can generate a magnetic field while with the help of a magnetic field, electric current can be induced into a […]
Electricity is one of the forms of energy which involves the flow of electrons. It is a basic part of nature and the most commonly used form of energy. The generation of electricity happens with the help of a device called an electric generator. When a current-carrying conductor moves across a magnetic field, an electric […]
Students studying under the Central Board of Secondary Education find the textbooks of Lakhmir Singh and Manjit Kaur as one of their go-to textbooks for references. These books are designed based on the latest CBSE syllabus. Every concept that is explained in this textbook comes with supporting examples and problems that give students an opportunity […]
There are 115 elements known at present. The elements are classified into different periods and groups, according to their properties. It was very difficult in an earlier period of time for scientists to study the properties of elements separately and dividing them into groups, based on their nature. Dobereiner’s triads were the earlier attempt to […]
Carbon is an Important entity that occurs in both organic and inorganic form. It is a non-metal having a symbol of ‘C’ and a main constituent of coal. The name carbon is derived from the Latin word ‘carbo” which means coal. All living organisms, plants and animals are made up of carbon-based compounds, which are […]
Based on the properties, elements have been divided into two; Metals and Non- Metals. They have an important part in our daily life. Both metals and non-metals are useful in different ways. There is a large number of metals and non-metals in the world. Metals are elements that can conduct electricity and are malleable and […]