Laser beams are used to measure long distances because
For television broadcasting, the frequency employed is normally
The attenuation in optical fiber is mainly due to
an antenna behaves as resonant circuit only when its length is
A laser is a coherent source because it contains
A laser beam is used for carrying out surgery because it
A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal i..
The ratio waves of frequency 300MHz to 3000MHz belong to
Maximum Usable frequency (MUF) in F - region layer is
The step index fiber has a relative refractive index of 0.88% . What is the critical angle at the corecladding interface
The characteristic impedance of a coaxial cable is of the order of
The electromagnetic waves of frequency 2 MHz to 30mhz are used
Choose the correct statement
The waves that are bent down by the ionosphere are
Amplitude modulation has
A laser beam of pulse power
The carrier frequency generated by a tank circuit containing 1 nF capacitor and 10 uH indicator is
AM is used for broadcasting because
In which frequency range, space waves are normally propagated
If u1 and u2 are the refractive indices of the material of core and cladding of an optical fibre, then the loss of light due to i..
An example of point to point mode of communication is
Through which mode of propagation, the radio waves can be sent from one place to another
The process of regaining of information from carrier wave at the receiver is termed as
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