Suppose that intensity of a laser is `((315)/(pi)) W//m^2` . The rms electric field, in units of V/m associated with this source is close to the nearest integer is _______ .
`(in_0 = 8.86 xx 10^(-12) C^2 Nm^(-2) , c= 3 xx 10^8 ms^(-1))`

The mean intensity of radiation on the surface of the Sun is about 10^(s)W//m^2 . The rms value of the corresponding magnetic field is closed to :

In an electromagnetic wave, the maximum value of the electric field is 100 Vm^(-1) The average intensity is [epsilon_90)=8.8xx10^(-12)c^(-2)N^(-1)m^(2)]

A laser beam has intensity 2.5 x (10^14)W (m^-2) . Find the amplitudes of electric and magnetic fields in the beam.

The photoelectric threshold wavelength of silver is 3250 xx 10^(-10) m . The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 xx 10^(-10) m is (Given h = 4.14 xx 10^(6) ms^(-1) eVs and c = 3 xx 10^(8) ms^(-1))

The photoelectric threshold wavelength of silver is 3250 xx 10^(-10) m . The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 xx 10^(-10) m is (Given h = 4.14 xx 10^(6) ms^(-1) eVs and c = 3 xx 10^(8) ms^(-1))

The electric field due to a charge at a distance of 3 m from it is 500 NC^(-1) . The magnitude of the charge is [(1)/(4 pi epsi_(0)) = 9 xx 10^(9) N - m^(2)//C^(2)]

A 27 mW laser beam has a cross-sectional maximum electric field in this electromagnetic wave is given by : [Given permittivity of space in_(0) = 9 xx 10^(12) SI units, Speed of light c= 3 xx 10^(8) m//s ]

A large charged metal sheet is placed in a uniform electric field, perpendicular to the electric field lines. After placing the sheet into the field, the electric field on the left side of the sheet is E_1 = 5 xx 10^5 Vm^(-1) and on the right it is E_2 = 3 xx 10^5 V m^(-1) . The sheet experiences a net electric force of 0.08 N. Find the area of one face of the sheet. Assume the external field to remain constant after introducing the large sheet. Use (1/(4piepsilon_0)) = 9 xx 10^(9) Nm^(2)C^(-2)

A laser beam has intensity 2.5 xx 10^14W m^-2 . Find the amplitudes of electric and magnetic fields in the beam.

A plane electromagnetic wave , has frequency of 2.0 xx 10^(10) Hz and its energy density is 1.02 xx 10^(-8)J//m^(3) in vacuum. The amplitude of the magnetic field of the wave is close to ((1)/( 4 pi epsi_0)=9xx 10^(9) (Nm^(2))/(C^(2)) and " speed of light "= 3 xx 10^(8) ms^(-1)) :