J.J Thomson observed deflection of cathode rays in:
Electron gun has an electrode called for controlling the
flow of electrons in the beam:
The critical angle for a beam of light passing from water
into air is 48.8 degrees. This mean that all light rays with an angle of
incidence greater than this angle will be:
The speed of sound in a liquid is …………..than that in gases:
The center of curved surface of spherical mirror is called:
