The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________
Myopia is a defect of Human eye it can be corrected by using a lens called
Night vision is possible with the help of ___________
A body can escape the gravitational pull of the earth if it is thrown up with a velocity of
A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect
Magnifying power of a simple microscope can be increased by
Twinkling of stars is caused by
The deepest place on earth is ____________
Cusec is a unit of _________
Lactometer is a type of Hydrometer which is used to measure the specific gravity of _________
