Question
Generation, propagation and detection of electromagnetic waves is the basis of:
✓
Answer
- Radio and television
The communication and broadcasting following the base on generation, propagation, and detection of electromagnetic waves.
The electromagnetic spectrum describes a different range of electromagnetic waves. These EM waves are a special type of wave that can travel without a medium.
Electromagnetic waves are named like this due to the fact that they have both an electric and a magnetic component. In a vacuum, EM waves always travel at the same speed i.e. the speed of light. So, other EM waves besides light are infrared, ultraviolet, radio waves, and microwaves.
Therefore radio and television both are based on EM wave properties. Other options like lasers, reactors, and computers are not guided by EM waves.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The focal lengths for violet, green and red light rays are $f_V, f_G$ and $f_R$ respectively. Which of the following is the true relationship
→There is a uniform electric field of strength $10^3\ V / m$ along $y-$axis. A body of mass $1 g$ and charge $10^{-6} C$ is projected into the field from origin along the positive $x-$axis with a velocity $10\ m / s$. Its speed in $m / s$ after $10 s$ is $($Neglect gravitation$)$
→The force of repulsion between two point charges is F, when these are 1m apart. Now the point charges are replaced by conducting spheres of radii 5cm having the charge same as that of point charges. The distance between their centres is 1m, then the force of repulsion will:
Light is:
Two cells of emf’s approximately 5V and 10V are to be accurately compared using a potentiometer of length 400cm.
A galvanometer of resistance $20\Omega$ is to be converted into an ammeter of range $1\ A.$ If a current of $1\ mA$ produces full scale deflection, the shunt required for the purpose is
→All six capacitors shown are identical, Each can withstand maximum $200$ volts between its terminals. The maximum voltage that can be safely applied between $A$ and $B$ is
→What will be the nature of charge on the metal paper clip of electroscope when a negatively charged body is brought in contact with it?
The energy emitted by a source is in the form of:
A galvanometer, having a resistance of $50 \Omega$ gives a full scale deflection for a current of $0.05 A$. The length in meter of a resistance wire of area of cross$-$section $2.97 \times 10^{–2} \ cm^2$ that can be used to convert the galvanometer into an ammeter which can read a maximum of $5 A$ current is $($Specific resistance of the wire $= 5 \times 10^{-7} Wm)$
→