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The work function of a metallic substance is 5 eV. The threshold frequency is approximately
- a)1.6 x 107 Hz
- b)8.68 x 1015 Hz
- c)9.68 x 1017Hz
- d)1.2 x 1015 Hz
Correct answer is option 'D'. Can you explain this answer?
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The work function of a metallic substance is 5 eV. The threshold frequ...
Work function (W0) and the threshold frequency (v0) are related as below
W0 = hvo
= 1.2 x 1015Hz
W0 = hvo
= 1.2 x 1015Hz
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The work function of a metallic substance is 5 eV. The threshold frequ...
Calculation of threshold frequency:
The threshold frequency (f) can be calculated using the following formula:
f = work function/h
where h is the Planck’s constant (6.626 x 10^-34 Js) and the work function is given as 5 eV.
Converting the work function from eV to Joules:
1 eV = 1.6 x 10^-19 J
Therefore, 5 eV = 5 x 1.6 x 10^-19 J = 8 x 10^-19 J
Substituting the values in the formula:
f = 8 x 10^-19 J / 6.626 x 10^-34 Js
f = 1.2 x 10^15 Hz
Therefore, the threshold frequency is approximately 1.2 x 10^15 Hz.
Answer: Option D
The threshold frequency (f) can be calculated using the following formula:
f = work function/h
where h is the Planck’s constant (6.626 x 10^-34 Js) and the work function is given as 5 eV.
Converting the work function from eV to Joules:
1 eV = 1.6 x 10^-19 J
Therefore, 5 eV = 5 x 1.6 x 10^-19 J = 8 x 10^-19 J
Substituting the values in the formula:
f = 8 x 10^-19 J / 6.626 x 10^-34 Js
f = 1.2 x 10^15 Hz
Therefore, the threshold frequency is approximately 1.2 x 10^15 Hz.
Answer: Option D
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The work function of a metallic substance is 5 eV. The threshold frequency is approximatelya)1.6 x 107 Hzb)8.68 x1015Hzc)9.68 x 1017Hzd)1.2 x 1015HzCorrect answer is option 'D'. Can you explain this answer?
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