Notes and Study material for Exams
Sound is measured in decibels (dB). An increase of about 10 dB is approximately double the increase in loudness. A person’s hearing can be damaged if exposed to noise levels over 75 dB over a prolonged period of time. The World Health Organization recommends that the sound level indoors should be less than 30 … Read more
What is Cropping? Cropping is the process of removing parts of an image to improve its composition or focus on a particular subject. It can be done manually or automatically, and it is a common technique used in photography, graphic design, and web development. Why Crop an Image? There are many reasons why you might … Read more
Environmental Pollution and Health Environmental pollution is the contamination of the physical and biological components of the Earth/atmosphere system to such an extent that normal environmental processes are adversely affected. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign … Read more