Question:medium
The surface of sodium metal is irradiated with radiation of wavelength \( x \) nm. The kinetic energy of ejected electrons is \( 2.8 \times 10^{-20} \) J. The work function of sodium is 2.3 eV. The value of \( x \) is _______ \( \times 10^2 \) nm. (Nearest integer)}
The surface of sodium metal is irradiated with radiation of wavelength \( x \) nm. The kinetic energy of ejected electrons is \( 2.8 \times 10^{-20} \) J. The work function of sodium is 2.3 eV. The value of \( x \) is _______ \( \times 10^2 \) nm. (Nearest integer)}
Updated On: Apr 10, 2026
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Correct Answer: 5
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