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Grade: 12th pass
        The max wavelength of radiation that can produce photoelectric effect in a certain metal is 200 nm. The max kinetic energy acquired by electron due to radiation of wavelength 100 nm will be? 1. 12.4ev2.  6.2 ev
2 years ago

Answers : (5)

Adarsh
763 Points
							
The answer will be 12.4ev .. 
Energy of wavelength (200-100) will give kinetic energy to electrons ..
so, Max. K.E= 12400/1000 = 12.4ev
2 years ago
Arun
24739 Points
							
Dear Kanika
 
Kmax = 12375 [1/1000  -  1/2000]
 = 6.2 ev
 
Hope it helps, in case of any query please feel free to ask
 
Regards
Arun (askIITians forum expert)
2 years ago
kanika
10 Points
							By putting what values you got 12375 in this?  Please explain......... I was not able to get this value.
						
2 years ago
Krishangi
15 Points
							
12375 is the value of hc
as KE=h√-h√° 
=> KE= hc/1000 A° - hc/2000A°
KE = hc(1/1000- 1/2000)
KE = 12375(1/1000-1/2000)
KE=6.2 
as hc=12375
one year ago
Kushagra Madhukar
askIITians Faculty
505 Points
							
Dear student,
Please find the solution to your problem.
 
Kmax = 12375 [1/1000 – 1/2000]
 = 6.2 eV
 
Thanks and regards,
Kushagra
3 days ago
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