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Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased to 100 kV then the de Broglie wavelength associated with the electrons would

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The correct Answer is:
2
`lambda = (h)/(sqrt(2mqV))`.
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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 3
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  2. The threshold frequency for a certain metal is 3.3xx10^(14) Hz. If lig...

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  3. Electrons used in an electron microscope are accelerated by a voltage ...

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  4. Monochromatic radiation emitted when electron on hydrogen atom jumps f...

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  7. If the momentum of an electron is changed by p, then the de - Broglie ...

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  8. For photoelectric emission from certain metal the cut - off frequency ...

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  9. If velocity of a particle is 3 times of that of electron and ratio of ...

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  10. The wavelength lambda(e ) of an electron and lambda(p) of a photon of...

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  11. If the kinetic energy of the particle is increased to 16 times its pre...

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  12. Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly r...

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  13. When the energy of the incident radiation is increased by 20 % , kinet...

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  14. When a certain metallic surface is illuminated with mono chromatic lig...

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  15. A photoelectric surface is illuminated successively by monochromatic l...

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  16. Light of wavelength 500 nm is incident on a metal with work function 2...

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  17. Electrons with de-Broglie wavelength lambda fall on the target in an X...

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  18. Photons with energy 5 eV are incident on a cathode C in a photoelectri...

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  19. An electron of mass m and a photon have same energy E. The ratio of de...

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  20. When a metallic surface is illuminated with radiation of wavelength la...

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