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The photoelectric threshold wavelength for a material is 3000 angstrom.Determine the kinetic energy emitted from it by a radiation of wavelength of 1000 angstrol

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VishalDangi8800

Answer:

13.2×10^-29

Explanation:

from formula,

● hc/incident wavelength = hc /theshold Wavelength. +kinetic energy

● kinetic energy =hc/incident wavelength - hc/ threshold wavelength

K.E= hc( 1/incident wavelength - 1/threshold wavelength)

= 6.6×10^-34 × 3×10^8(3000-1000/3×10^6)

= 13.2 ×10^-29

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