The scientist who first sent electromagnetic waves to distant places is
1). James Clerk Maxwell
2). Heinrich Hertz
3). Thomas Alva Edison
4). John Logie Baird
1. What is the net charge on Calcium fluoride?
2. In which one of the following the phenomenon of total internal reflection of light is used ?
4. Gas thermometers are more sensitive than the liquid thermometers because the gases
5. In a photocell light energy is converted into
6. A microscope used in pathological laboratories forms
7. The sparkling of a diamond is due to
8. The Law of Kepler is related with which among the following ?