Ask a Question

Light of frequency 7.21 × 10^14 Hz is incident on a metal surface.

← Prev Question Next Question →
0 votes
16 views
asked Jan 10, 2018 in Physics by sforrest072 (157,439 points) ● 61 ● 410 ● 949
edited Mar 5, 2018 by Vikash Kumar

Light of frequency 7.21 × 1014 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 105 m/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?

1 Answer

0 votes
answered Jan 10, 2018 by mdsamim (213,225 points) ● 5 ● 10 ● 15
edited Mar 5, 2018 by Vikash Kumar
 
Best answer

Mass of an electron, m = 9.1 × 10−31 kg 

For threshold frequency ν0, the relation for kinetic energy is written as:

Therefore, the threshold frequency for the photoemission of electrons is 4.738 × 1014 Hz.

← Prev Question Next Question →

Related questions

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon
~~~*****~~~

Related questions

© 2017 Sarthaks eConnect
Managed by Sarthaks Digitizing India
...