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Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function?
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Electrons are emmited with zero velocity from certain metal surface wh...
As we know hv=hv0+1/2mv²since velocity=0hv=hv0 the work function hv0=hc/lambdaCalculate work function as above.threshold frequency =c/lambda
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Electrons are emmited with zero velocity from certain metal surface wh...
Threshold Frequency Calculation:
- The threshold frequency (f) can be calculated using the formula:
f = c / λ
where c is the speed of light (3 x 10^8 m/s) and λ is the wavelength of the radiation (6000 A = 6000 x 10^-10 m).
- Plugging in the values, we get:
f = 3 x 10^8 / (6000 x 10^-10) = 5 x 10^14 Hz
Work Function Calculation:
- The work function (φ) can be calculated using the formula:
K.E. max = hf - φ
where K.E. max is the maximum kinetic energy of the emitted electron, h is the Planck's constant (6.63 x 10^-34 J.s) and f is the frequency of the radiation.
- Since the electrons are emitted with zero velocity, the maximum kinetic energy is zero:
0 = hf - φ
φ = hf
- Substituting the values of h and f, we get:
φ = 6.63 x 10^-34 x 5 x 10^14 = 3.315 x 10^-19 J
Therefore, the threshold frequency is 5 x 10^14 Hz and the work function is 3.315 x 10^-19 J.
- The threshold frequency (f) can be calculated using the formula:
f = c / λ
where c is the speed of light (3 x 10^8 m/s) and λ is the wavelength of the radiation (6000 A = 6000 x 10^-10 m).
- Plugging in the values, we get:
f = 3 x 10^8 / (6000 x 10^-10) = 5 x 10^14 Hz
Work Function Calculation:
- The work function (φ) can be calculated using the formula:
K.E. max = hf - φ
where K.E. max is the maximum kinetic energy of the emitted electron, h is the Planck's constant (6.63 x 10^-34 J.s) and f is the frequency of the radiation.
- Since the electrons are emitted with zero velocity, the maximum kinetic energy is zero:
0 = hf - φ
φ = hf
- Substituting the values of h and f, we get:
φ = 6.63 x 10^-34 x 5 x 10^14 = 3.315 x 10^-19 J
Therefore, the threshold frequency is 5 x 10^14 Hz and the work function is 3.315 x 10^-19 J.
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Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function?
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Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function?.
Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Electrons are emmited with zero velocity from certain metal surface where it is exposed to radiation of wavelength 6000A calculate threshold frequency and work function?.
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