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Dual Nature of Radiation and Matter question

2006 · Q145
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Dual Nature of Radiation and Matter question

2006 · Q145

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
When photons of energy hυ\upsilonυ fall on an aluminimum plate (of work function E0), photoelectrons of maximum kinetic energy K are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be
  1. A
    K + hυ\upsilonυ
  2. B
    K + E0
  3. C
    2K
  4. D
    K.
View written solutionFree

Correct answer: A

According to Einstein’s photoelectric equation,

K = hν\nu ν – E0 ... (i)

and K' = h(2ν\nu ν) – E0 ... (ii)

= 2hν\nu ν – E0 = hν\nu ν + hν\nu ν – E0

K'= hν\nu ν + K [using (i)]

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