Young Minds Coaching Center

Introduction  Energy is one of the most important concepts in science and in our daily lives. It is defined as the ability to do work. Every activity we do—walking, reading, running, cooking, or even sleeping—requires energy. Without energy, life would not be possible. All living things, including humans, animals, and plants, need energy to grow, move, and survive. There are different forms of energy around us such as heat energy, light energy, sound energy, chemical energy, mechanical energy, and electrical energy. For example, the Sun gives us light and heat energy, which helps plants to grow and also keeps our environment warm. When we eat food, our body gets chemical energy that gives us strength. Machines and electrical appliances like fans, refrigerators, and televisions work using electrical energy. Energy can be broadly classified into two main types—renewable and non-renewable. Renewable energy sources like solar energy, wind energy, and hydro energy are natural and can be...

Introduction The refraction of light is the bending of light rays as they pass from one medium to another, thereby changing the path of the rays. Refraction occurs due to a change in the speed of the light ray or wave. The speed of light is greatest in a vacuum. When the light rays travel from a rarer to a denser medium, they bend towards the normal. If the light rays travel from a denser to a rarer medium, they bend away from the normal. The greater the density of the media, the higher the refractive index.  This phenomenon is responsible for many interesting effects we observe in daily life, from lenses in spectacles to the colors of a rainbow. What is Refraction of Light? When light passes from one medium (like air) into another medium (like water or glass), its speed changes, which causes it to change direction. This bending of light is known as refraction. Example: A pencil appears bent when placed in a glass of water. Causes of Refraction Refraction of light occurs when light...