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Theory of Aquired Inheritance

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In a historical experiment to determine Planck’s constant

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Q. In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength (

λ

) of incident light at the corresponding stopping potential (

V_{0}

) are given below:

$λ (μ m)$	$V_{0}$ (Volt)
0.3	2.0
0.4	1.0
0.5	0.4

c = 3 \times 10^{8} m s^{- 1}

e = 1.6 \times 10^{- 19} C

, Planck's constant (in units of J s) from such an experiment is :

Q. In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectric energies were measured by applying a stopping potential. The relevant data for the wavelength (

λ

) of incident light at the corresponding stopping potential (

V_{0}

) are given below:

$λ (μ m)$	$V_{0}$ (Volt)
$0.3$	$2.0$
$0.4$	$1.0$
$0.5$	$0.4$

c = 3 \times 10^{8} m s^{- 1}

e = 1.6 \times 10^{- 19} C

, Planck's constant (in units of

J - s

) from such an experiment is

Q. In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectric energies were measured by applying a stopping potential. The relevant data for the wavelength (

λ

) of incident light at the corresponding stopping potential (

V_{0}

) are given below:

$λ (μ m)$	$V_{0}$ (Volt)
$0.3$	$2.0$
$0.4$	$1.0$
$0.5$	$0.4$

c = 3 \times 10^{8} m s^{- 1}

e = 1.6 \times 10^{- 19} C

, Planck's constant (in units of

J - s

) from such an experiment is

Q. According to X: A historical research is similar to the research carried out in physical or natural sciences.
Y says: A physical science experiment is very different from historical research.

Q. In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be

4.12 \times 10^{- 15} V s

. Calculate the value of Plancks constant.

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