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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
one year ago

Answers : (4)

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
one year ago
Arun
22780 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)
one year ago
kanika
10 Points
							By putting what values you got 12375 in this?  Please explain......... I was not able to get this value.
						
one year 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
9 months ago
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