physical features of india rivers

. They are useful in showing areas of diseased and healthy vegetation. Healthy plants appear red. Young plants show bright red while those ready for harvesting appear dark red. Plants affected by drought and disease can be identified by the different color of their images compared with the dark red..

To Determine the Width of a River..

PQ, the width of the river= W. AB, the known distance=..

Refraction of Light..

Rutherford's Atom Model (Main Features) - (i) Every atom consists of a nucleus containing the entire +ve charge. The whole mass of atom is concentrated at this core. (ii) The size of the nucleus i.e., 10 - 1 5 m is very small compared to the size of the atom (i.e., 10 - 1 0 m). (iii) The ..

(i) Every atom consists of a nucleus containing the entire +ve charge. The whole mass of atom is concentrated at this core. (ii) The size of the nucleus i.e., 10 - 1 5 m is very small compared to the size of the atom (i.e., 10 - 1 0 m). (iii) The atom as a whole is electrically neutral wit..

Humidity is the amount of moisture (water vapor) present in the atmosphere. This moisture is due to the continuous evaporation of river, lakes, and oceans, and also from various life activitie..

Scientists who investigate weather phenomenon are called meteorologists. To study a particular feature, may require an observation from a larger area. By combining great number of observations and analysing them by computers it is possible to get information about a large weather sy..

The electricity produced from flowing water is called Hydroelectric power. The world's first hydroelectric power plant was set up in 1882 in Wisconsin USA. It had a very small output, supplying power only for about 250 light bulbs. But from this small start the production of hydroelectricity has gr..

The branch of physics dealing with the study of optical phenomena is called optics. This can be divided into two categories, ray optics and wave optics. Wave optics describes the connection between waves and rays of light. The wave theory of light was put forth by Huygen and later modifie..