Search any question & find its solution
Question:
Answered & Verified by Expert
Radiations of two photons having energies twice and five times the work function of metal are incident successively on metal surface. The ratio of the maximum velocity of photo electrons emitted in the two cases will be
Options:
Solution:
2935 Upvotes
Verified Answer
The correct answer is:
$1: 4$
$\begin{aligned} & \frac{K_1 E_{\max }}{K \cdot E_{\operatorname{man} 2}}=\frac{E_1-\phi_0}{E_2-\phi_0}=\frac{2 \phi_0-\phi_0}{5 \phi_0-\phi_a} \\ & \therefore \quad \frac{K \cdot E_{\max }}{K \cdot E_{\max 2}}=\frac{1}{4} \\ & \end{aligned}$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.