A light beam is incident on a metal target with a work function of 2.3 eV. If a stopping potential of 1.3 V is required, what is the wavelength of the incident light? (h = 6.63 × 10-34 J s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J):

A light beam is incident on a metal target with a work function of 2.3

1.	A light beam is incident on a metal target with a work function of 2.3 eV. If a stopping potential of 1.3 V is required, what is the wavelength of the incident light? (h = 6.63 × 10-34 J s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J):
A.	76 nm
B.	345 nm
C.	487 nm
D.	1411 nm
Answer» C. 487 nm

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A light beam is incident on a metal target with a work function of 2.3 eV. If a stopping potential of 1.3 V is required, what is the wavelength of the incident light? (h = 6.63 × 10-34 J s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J):

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