major physical features

. 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..

The arrangement of stars in Ursa Major constellation is shown in the figure. The great bear constellation reminds us of a large ladle or a question mark studded in the sky. The Ursa Major is called great bear because its stars are arranged in such a way that they also seem to fo..

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..

As a result of two magnetic fields acting at the same place, the resultant field has a special feature. At a particular point, if the compass needle does not point in any particular direction, then there is no net magnetic field at the point. Such a point is called Neutral point or ..

One desirable feature of radio transmission is that it should be carried without wires (i.e.,) radiated into space. At audio frequencies, radiation is not practicable because the efficiency of radiation is poor. However, efficient radiation of electrical energy is possible at high freque..

There are two major types of magnets: Permanent magnets and Temporary magnets. Permanent magnets retain their magnetism over a long period of time whereas temporary magnets retain their magnetic properties only under certain conditions like presence of a strong magnet or an electric..

Water hyacinth, (weeds that clog major waterways) restricting boat traffic are held in check in a lagoon by careful harvesting. Biogas plants use these dried plants as raw material..

Structure of the Earth - In outward appearance, the earth is a nearly spherical ball with a radius of 6350 kilometers. Internally, the earth consists of three major layers. They are: Crust Mantle Co..