JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
X Rays
question_answer
The wavelength of most energetic X-rays emitted when a metal target is bombarded by 40KeV electrons, is approximately (\[h=6.62\times {{10}^{-34}}\] J-sec; 1 eV = \[1.6\times {{10}^{-19}}\]J; c = \[3\times {{10}^{8}}\,m/s)\] [MNR 1991; MP PMT 1999; UPSEAT 2000; Pb. PET 2004]