Large astronomical telescopes always use as objective
In which of the following industries is mica as a raw material?
Identify the vector quantity from the following
Mach number is used in connection with the speed of
Rainbow is due to
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
Supersonic plane fly with the speed
Optical fibre works on the
Out of the following pairs, which one does not have identical dimension?
Intensity of sound at a point is ____ its distance from the source.