Dual Nature of Radiation and Matter

Related Questions

• In a Thomson set-up for the determination of e/m, electrons accelerated by 2.5 $kV$ enter the region of crossed electric and magnetic fields of strengths $3.6 \times {10^4}V{m^{ - 1}}$ and $1.2 \times {10^{ - 3}}T$ respectively and go through undeflected. The measured value of $e/m$ of the electron is equal to

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• Which of one is correct

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• The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be

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• The de-Broglie wavelength of an electron having $80eV$ of energy is nearly ($1eV = 1.6 \times 10^{–19}$ J, Mass of electron = $9 \times 10^{–31}$ kg Plank’s constant = $6.6 \times 10^{–34}$ J-sec)

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• A beam of light of wavelength $\lambda $ and with illumination L falls on a clean surface of sodium. If N photoelectrons are emitted each with kinetic energy E, then

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