The waves relevant to telecommunications are
(d) Visible light
Measons are found in
(a) Gamma rays
(b) Cosmic rays
(d) Laser beam
The cathode ray particles originate in a discharge tube from the
(a) Source of high voltage
(b) Residual gas
The cause of fractional atomic weights of elements is the presence of
Which one of the following is not a radioactive element?
Which of the particles has similar mass to that of the electron?
Nuclear forces are mediated by
The north pole of the earth's magnet is near the geographical
The split ring in motion is called
Optical fibres are mainly used for which of the following?
(c) Musical instruments
(d) Food industry