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If light of wavelength of maximum intensity emitted from surface at temperature T1 is used to cause photoelectric emission from a metallic surface, the maximum kinetic energy of the emitted electron is 6 ev, which is 3 times the work function of the metallic surface. If light of wavelength of maximum intensity emitted from a surface at temperature T2T2 = 2T1 is used, the maximum kinetic energy of the photoelectrons emitted is

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a

2 eV

b

4 eV

c

14 eV

d

18 eV

answer is C.

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Detailed Solution

from Wien's displacement law if  absolute temperature becomes double wavelength becomes halved i.e frequency or energy becomes doublefor the first case   hν =2 +6   as it is given workfunciton is 6/3 =2⇒hν=8for the second case  16  = 2 + KK= 14
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If light of wavelength of maximum intensity emitted from surface at temperature T1 is used to cause photoelectric emission from a metallic surface, the maximum kinetic energy of the emitted electron is 6 ev, which is 3 times the work function of the metallic surface. If light of wavelength of maximum intensity emitted from a surface at temperature T2T2 = 2T1 is used, the maximum kinetic energy of the photoelectrons emitted is