One requires 11 \(eV\) of energy to dissociate a carbon monoxide molecule into carbon and oxygen atom. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lines in

An EM wave of intensity I falls on a surface kept in vacuum and experts radiation pressure kept in vacuum and experts radiation pressure p on it. Which of the following are true?

The velocity of light in vacuum can be changed by changing

The waves used in Telecommunications are

If you find close loops of \(\overset { \rightarrow }{ B } \) in a region in space, does it necessarily mean that actual charges are flowing across the area bounded by the loops?

A plane electromagnetic wave travels in vacuum along the z-direction. what can you say about the direction of an electric and magnetic field vectors

Write the formula for the velocity of light in a material medium of relative permeability \({ \epsilon }_{ r }\) and relative magnetic permeability  \({ \mu }_{ r }\)

What are the basic sources of an electromagnetic wave?

Name the scientist connected with history of an electromagnetic wave

The average energy flux of sunlight is \(1.0 \ kW \ { m }^{ -2 }\) . This energy of radiation is falling normally on the metal plate surface of area \(10 \ { cm }^{ 2 }\) which completely absorbs the energy. how much force is exerted on the plate if it is exposed to sunlight for 10 minutes?

Why does galvanometer show a momentary deflection at the time of charging or discharging a capacitor? Write the necessary expression to explain this observation?

The terminology for different parts of the electromagnetic spectrum is given in the text, use the formula \(E=Hv\) (for energy of a quantum of radiation : photon) and obtain the photon energy in units of \(eV\) for different parts of the e.m. spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?

In a plane e.m. wave, the electric field oscillates sinusoidally at a frequency of \(2.0\times 10^{ 10 }\) Hz and amplitude \(48 \ Vm^{ -1 }\).
(a) What is the wavelength of the wave?
(b) What is the amplitude of the oscillating magnetic field?
(c) Show that the average energy density of the E field equals to the average energy density of the B field. \(\left[ c=3.0\times 10^{ 8 } \ ms^{ -1 } \right] \)

A parallel plate capacitor of plate separation 2mm is connected in an electric circuit having source voltage 400 V. What is the value of the displacement current for \({ 10 }^{ -6 }\) second if the plate area is \(60 \ { cm }^{ 2 }\)?

Electromagnetic charge emits electromagnetic waves.

How would you set up an instantaneous displacement current of 2.0 A within the space between the two parallel plates of \(3_{ \mu }F\) capacitance?

A plane electromagnetic wave of frequency 25MHz travels in free space along the x-direction. At a particular point in space and time the electric vector is \(\overrightarrow { E } =6.3V/m\hat { j } \)Calculate \(\overrightarrow { B } \) at this point.

Light with an energy flux of 18 watt/cm² falls on a non-reflecting surface at normal incidence. If the surface has an area of 20 cm² , find the average force exerted on the surface during a 30 minute time span, when no incident light is reflected. How will your result be modified if the surface is a perfect reflector?

The magnetic field in a plane electromagnetic wave is given by \(B=\left( 300\mu T \right) \sin { \left( 5.0\times { 10 }^{ -5 }{ s }^{ -1 } \right) } \left( t-x/c \right) \) Find (i) the maximum electric field and (ii) the average energy density corresponding to the electric field.