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Q:

A  photon  of  X-ray  has  energy  of  1  keV.  A photon of visible radiation has energy of 3 eV.  In  this  context,  which  one  of  the following statements is not correct?

A) The wavelength of X-ray photon is less than the wavelength of visible radiation photon. B) Both    the    photons    have    different energies.
C) The  speeds  of  both  the  photons  in vacuum are different D) The   frequency   of   X-ray   photon   is higher  than  the  frequency  of  visible radiation photon.

Answer:   C) The  speeds  of  both  the  photons  in vacuum are different



Explanation:

The speed of all the electromagnetic radiation are always   same   and   equal   to   the numerical value 3 x 10^8m/sec.

Subject: Physics
Exam Prep: Bank Exams
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