Grade 12th passModern Physics

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

kanika

8 Years agoGrade 12th pass

5 Answers

Adarsh

8 Years ago

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

Arun

Approved Tutor Answer8 Years ago

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)

kanika

8 Years ago

By putting what values you got 12375 in this? Please explain......... I was not able to get this value.

Krishangi

7 Years ago

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

Kushagra Madhukar

5 Years ago

Dear student,

Please find the solution to your problem.

K_max = 12375 [1/1000 – 1/2000]

= 6.2 eV

Thanks and regards,

Kushagra

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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

kanika

5 Answers

Adarsh

Arun

kanika

Krishangi

Kushagra Madhukar

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