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1.
According to Maxwell's hypothesis, a changing electric field gives rise to
2.
The shortest wavelength of X-rays emitted from an X-rays tube depends upon
3.
Hydrogen atom does not emit X-rays because
4.
The refractive index and the permeability of a medium are respectively
. The relative permittivity of the medium is nearly
. The relative permittivity of the medium is nearly
5.
The energy of X-ray photon is 2200 eV. Its frequency would be
6.
A lasser beam is sent to the moon and reflected back to earth by ay mirror placed on the moon by an astronaut. If the moon is 384000 km from earth, how long does it take the light to make the round trip?
7.
The amplitude of electric field in a parallel beam of light of intensity 
is
is
8.
Maxwell in his famous equation of electromagnetism introduced the concept of
9.
Electric fields induced by changing magnetic fields are
10.
The correct sequence of the increasing wavelength of the given radiation sources is