Let us list some of the factors, which could possibly influence the speed of wave propagation:
nature of the source.

4 Let us list some of the factors, which could possibly influence the speed of wave propagation:(i) nature of the source.(ii) direction of propagation.(iii) motion of the source and/or observer.(iv) wavelength. (v) intensity of the wave. On which of these factors, if any, does,depend? :the speed of light in vacuum

5 Let us list some of the factors, which could possibly influence the speed of wave propagation: (i) nature of the source (ii) direction of propagation. (iii) motion of the source and/or observer. (iv) wavelength. (v) intensity of the wave. On which of te factors, if any, does,depend?: the speed of light in a medium (say, glass or water)

List three factors which influence water potential.

List the factors which influence ionisation energy. actions.

List any two factors which influence growth.

When can a charge act as a source of electromagnetic wave? How are there directions of electric and magneitc field vectors, in an electromagnetic wave related to each other and to the direction of propagation of the wave? Which physical quantity, if any has the same value for waves belonging to the differnt parts of the electromangetic spectrum?

The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation? - (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area. (b)After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated. This is an example of evolution by artificial selection.

Electromagnetic spectrum Electromagnetic waves are coupled time varying electric and magnetic fields, propagating in space, with the speed very close to that of light (3xx10^8 ms^-1) . An the orderly distribution and classification of electromagnetic waves according to their frequency or wavelength is called electromagnetic spectrum. electromagnetic waves inclued visible light, ultraviolet waves, infra red waves, X-rays, gamma-rays, microwaves and radiowaves. The electromagnetic waves used in surgery for detection of fractures, diseased organs, forensic matter like bullet, etc, are