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NEET 2005
Exam
NEET
Year
2005
Subject
Physics
Chapter
Dual Nature of Matter

NEET 2005 · Physics · Dual Nature of Matter

The work functions for metal a, b and c are respectively 1.92 eV,...

The work functions for metal a,b\mathrm{a}, \mathrm{b} and c are respectively 1.92eV,2.0eV1.92 \mathrm{eV}, 2.0 \mathrm{eV} and 5 eV. According to Einstein's equation the metals which will emit photoelectrons for a radiation of wavelength 4100A˚4100 Å is a/are:

Options

  1. Anone
  2. B'a' only
  3. C'a' and 'b' only
  4. Dall the three metals

Correct answer

C. 'a' and 'b' only

Step-by-step solution

Energy of photon =124004100=3eV=\frac{12400}{4100}=3 \mathrm{eV}
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