Dual Nature of Radiation and Matter - Result Question 57

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61. Light of wavelength $5000 \AA$ falls on a sensitive plate with photo-electric work function of 1.9 $eV$. The kinetic energy of the photo-electrons emitted will be

======= ####61. Light of wavelength $5000 \AA$ falls on a sensitive plate with photo-electric work function of 1.9 $eV$. The kinetic energy of the photo-electrons emitted will be

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/dual-nature-of-radiation-and-matter/dual-nature-of-radiation-and-matter—result-question-57.md (a) $0.58 eV$

(c) $1.24 eV$

(b) $2.48 eV$

(d) $1.16 eV$

[1998]

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Answer:

Correct Answer: 61. (a)

Solution:

  1. (a) K.E. $=h v-h v_0$

$ \begin{aligned} & =\frac{h c}{\lambda}-h v_0=\frac{12375}{5000}-1.9 \\ & =2.48-1.9=0.58 eV \end{aligned} $