A metal whose work function is 3-3 eV is illuminated by light of wavelength 3 - 10-7 m- What is the threshold frequency for photoelectric emission- Given Planck-s constant - 6-6 - 10-34 Js-

Work function, W_0 = hν_0 = 3.3 eV = 3.3 × 1.6 × 10^ 19 J Therefore, the threshold frequency, ν_0 = W_0/h = 3.3 × 1.6 × 10^ 19/6.6 × 10^ 34 = 0.8 × 10^15Hz Henc ...

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Standard VIII

Biology

Method of finding LCM

A metal whose...

Question

A metal whose work function is $3.3 e V$ is illuminated by light of wavelength $3 \times 10^{- 7}$ m. What is the threshold frequency for photoelectric emission? Given Planck's constant $= 6.6 \times 10^{- 34} J s$ .

0.4 \times 10^{15} H z

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0.8 \times 10^{15} H z

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1.6 \times 10^{15} H z

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3.2 \times 10^{15} H z

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Solution

The correct option is B $0.8 \times 10^{15} H z$
Work function, $W_{0} = h ν_{0} = 3.3 e V = 3.3 \times 1.6 \times 10^{- 19} J$
Therefore, the threshold frequency, $ν_{0} = \frac{W_{0}}{h} = \frac{3.3 \times 1.6 \times 10^{- 19}}{6.6 \times 10^{- 34}} = 0.8 \times 10^{15} H z$
Hence, the correct choice is (b).

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Similar questions

Q. A metal whose work function is

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3 \times 10^{- 7}

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Q. In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is

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A metal whose work function is 3.3 eV is illuminated by light of wavelength 3×10−7 m. What is the threshold frequency for photoelectric emission? Given Planck's constant =6.6×10−34 Js.

The correct option is B 0.8×1015 HzWork function, W0=hν0=3.3eV=3.3×1.6×10−19 J Therefore, the threshold frequency, ν0=W0h=3.3×1.6×10−196.6×10−34=0.8×1015Hz Hence, the correct choice is (b).

A metal whose work function is $3.3 e V$ is illuminated by light of wavelength $3 \times 10^{- 7}$ m. What is the threshold frequency for photoelectric emission? Given Planck's constant $= 6.6 \times 10^{- 34} J s$ .