Light of wavelength 5000 Å falls on a sensitive plate

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Light of wavelength 5000 Å falls on a sensitive plate with photo-electric work function of 1.9 eV. The kinetic energy of the photo-electrons emitted will be

1. 0.58 eV
2. 2.48 eV
3. 1.24 eV
4. 1.16 eV

Correct Option: A

K.E. = hν – hν₀

=	hc	– hν₀ =	12375	- 1.9
	λ		5000

= 2.48 – 1.9 = 0.58 eV