In a historical experiment to determine Planck's constant, a metal sur

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 (V0) are given below:λ(μm)V0 (Volt)0.32.00.41.00.50.4Given, c=3×108 ms−1 and e=1.6×10−19 C, Planck's constant (in units of J−s) from such an experiment is

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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)
$0.3$	$2.0$
$0.4$	$1.0$
$0.5$	$0.4$

Given,

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

and

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

, Planck's constant (in units of

J - s

) from such an experiment is

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