Register to reply

Photoelectric Effect, Threshold Frequency etc.

by Andresx90
Tags: effect, frequency, photoelectric, threshold
Share this thread:
Andresx90
#1
Oct2-07, 05:00 PM
P: 8
1. The problem statement, all variables and given/known data
Light of intensity 1.5 x 10 (x)-2 Wm/2 and wavelength 250 x 10 (x)-9m is incident on an iron surface of area 1 x 10 (x) -4 m2. The iron surface reflects 95% of the light. The threshold frequency for iron is 1.1 x 10x15 Hz.
Calculate:
1) The intensity of light available for the photoelectric effect
2) The number of electrons emitted per second
3) The work function in electron volts for iron
4) The stopping potential for this radiation

Could someone answer this question for me showing working used as well.

(x) in this instance means to the power of.



2. Relevant equations



3. The attempt at a solution

1) 95% of the light intensity already given (no calculator)
Phys.Org News Partner Science news on Phys.org
Bees able to spot which flowers offer best rewards before landing
Classic Lewis Carroll character inspires new ecological model
When cooperation counts: Researchers find sperm benefit from grouping together in mice
Kurdt
#2
Oct2-07, 05:08 PM
Emeritus
Sci Advisor
PF Gold
P: 4,981
We will not answer the questions for you here at PF. We can help guide you to the answer but most of the work has to be your own. Please refer to the forum guidelines.

http://www.physicsforums.com/showthread.php?t=5374

Please post your attempt at the other parts of the question.


Register to reply

Related Discussions
Threshold Frequency Introductory Physics Homework 8
Threshold Frequency Introductory Physics Homework 1
Threshold Frequency: PE effect General Physics 5
Threshold frequency General Physics 4
Threshold frequency Introductory Physics Homework 3