Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • For frequencies of incident radiations photoelectric emission was observed

For frequencies \mathrm{\nu_1 \; and \; \nu_2} of incident radiations photoelectric emission was observed from the surface. \mathrm{\left(\nu_1>\nu_2\right)}. What is the threshold frequency \mathrm{\nu_0}, If the maximum Kinetic energy of photoelectrons in the two cases are in the ratio of 1: 4 ?

Option: 1

\nu_2-\nu_1


Option: 2

\frac{4 \nu_1-\nu_2}{3}


Option: 3

\mathrm{\frac{2 \nu_2-\nu_1}{3}}


Option: 4

\mathrm{\frac{\nu_2-\nu_1}{2}}


Answers (1)

best_answer

\begin{gathered} \mathrm{h \nu_1=h \nu_0+(KE)_1} \\ \\\mathrm{h \nu_2=h\nu_0+(KE)_2} \\ \\\mathrm{\frac{h\left(\nu_1-\nu_0\right)}{h\left(\nu_2-\nu_0\right)}=\frac{(K E)_1}{(K E)_2}=\frac{1}{4} }\\ \\\mathrm{4\left(\nu_1-\nu_0\right)=\nu_2-\nu_0} \end{gathered}

\begin{aligned} & \mathrm{4 \nu_1-4 \nu_0=\nu_2-\nu_0} \\ \\& \mathrm{ 4 \nu_1-\nu_2=4 \nu_0-\nu_0=3 \nu_0} \\ \\& \mathrm{ \nu_0=\frac{4 \nu_1-\nu_2}{3}} \end{aligned}

Option 2 is correct.

Posted by

Gunjita

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

'PM Modi personally supervising the situation': Centre tells SC in NEET case
anam-khan

NEET Paper Leak Row: NTA informs SC of security overhaul, institutional reforms
anam-khan

Re-NEET 2026 City Intimation Slip LIVE: NTA MBBS admit card soon; direct link, login details, exam date

Latest Question