Negative Work function in Photo electric effect

  • Thread starter logearav
  • Start date
  • #1
338
0

Homework Statement



In my attachment, the x intercept gives threshold frequency and the y intercept gives the work function.

Homework Equations





The Attempt at a Solution


Work function is the minimum energy needed to pull out an electron from the metal surface. My question is, from the graph, work function is a negative value. Will work function takes negative values?

Homework Statement





Homework Equations





The Attempt at a Solution

 

Attachments

  • 17a0d8fb-7882-4256-9531-9883e39d1557.gif
    17a0d8fb-7882-4256-9531-9883e39d1557.gif
    2.6 KB · Views: 909

Answers and Replies

  • #2
Doc Al
Mentor
45,180
1,503
In my attachment, the x intercept gives threshold frequency and the y intercept gives the work function.
The y intercept gives the negative of the work function. (It's even marked -Φ on the diagram.) The work function is positive.
 
  • #3
338
0
Doc Al,
How negative of the work function becomes positive work function.
 
  • #4
Doc Al
Mentor
45,180
1,503
Doc Al,
How negative of the work function becomes positive work function.
The work function is the negative of the y-intercept. Since the y-intercept is negative, the work function is positive.
 
  • #5
338
0
I got it now Doc Al. Thank you so much
 

Related Threads on Negative Work function in Photo electric effect

  • Last Post
Replies
5
Views
6K
  • Last Post
Replies
7
Views
602
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
639
  • Last Post
Replies
1
Views
4K
Replies
5
Views
10K
Replies
0
Views
2K
Replies
3
Views
3K
Top