Which of the following statements is/are correct?
1. Electron can be used to image very small objects because it can be tuned to wavelengths comparable to atomic dimension and focused by electromagnetic fields to a small spot.
2. 5 eV electrons can be used to conduct surface diffraction studies because their wavelength is comparable to the interatomic spacing of atoms on surfaces and they are surface sensitive.
3. In high resolution TEM, atomic resolution can be obtained when the focused electron beam hits the nucleus of the atom.
a) 1 only b) 2 only c) 3 only d) 1 and 3 only e) none