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In a photoelectric  effect  experiment the threshold wavelength of light is 380nm.If the wavelength of incident light is 260nm, the maximum kinetic energy of emitted electrons will be: Given  E (in eV)=

(a)

4.5eV

(b)

15.1eV

(c)

3.0eV

(d)

1.5eV



Question ID - 51323 | SaraNextGen Top Answer

In a photoelectric  effect  experiment the threshold wavelength of light is 380nm.If the wavelength of incident light is 260nm, the maximum kinetic energy of emitted electrons will be: Given  E (in eV)=

(a)

4.5eV

(b)

15.1eV

(c)

3.0eV

(d)

1.5eV

1 Answer
127 votes
Answer Key / Explanation : (d) -

Wavelength of incident waves

Cut off (threshold)wavelength  =380nm

Then     

K =

=1237

= = 1.5eV

127 votes


127