?Which are the relevant waves in?telecommunication?
1). X ? rays
2). Violet ? rays
3). microwaves
4). all of them?
1. A soap bubble shows colours when illuminated with white light. This is due to
2. For an ideal gas, which one of the following statements does not hold true?
3. During uniform motion of an object along a straight line, the ________ remains constant with time.
4. The source of the Sun's energy is the process of
5. The Doppler's effect is applicable?for
6. In SONAR which kind of wave is used?
7. The wave of theory of light is based on
8. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
9. The time period of a seconds pendulum Is
10. Minimum number of unequal vectors which can give zero resultant are