+91-87964 74404
FlagBACK
Question icon
Grade upto college level Modern Physics

When a beam of 106 eV photon of intensity 2.0 W/m2 falls on a platinum surface of area 1.0x 10-4 m2 and work function 5.6 eV, 0.53% of the incident photons eject photoelectrons. Find the number of photoelectrons emitted per second and their minimum and maximum energies

Profile image of Amit Saxena
12 Years agoGrade upto college level
Answers icon

1 Answer

Profile image of Navjyot Kalra
12 Years ago
Hello Student,
Please find the answer to your question
No. of photons /sec
= Energy incident on platinum surface per second / Energy of on photon
No. of photon incident per second
= 2 x 10 x 10-4 / 10. 6 x 1.6 x 10-19 = 1. 18 x 1014
As 0.53% of incident photon can eject photoelectrons
∴ No. of photoelectrons ejected per second
= 1.18 x 1014 x 0.53 / 100 = 6.25 x 1011
Minimum energy = 0 eV,
Maximum energy = (10.6 – 5.6 ) eV = 5eV
Thanks
Navjot Kalra
askIITians Faculty

Other Related Questions on modern physics

question mark
A particle is projected in vertical plane such that after 5 seconds its velocity becomes horizontal. The maximum height attained by the projectile from point of projection is n3 m. The value of n is _______. (g = 10 m/s2)
modern physics
1 Answer Available

Last Activity: 3 Years ago

question mark
Two particles approach each other from very large distance as shown, . if the least separation between the particles is b, what is the speed of M in center of mass frame when particles are closest? (gravity negligible)
modern physics
1 Answer Available

Last Activity: 4 Years ago

question mark
Can the sum of two equal vectors be equal to either vector
 
modern physics
1 Answer Available

Last Activity: 4 Years ago

question mark
A nucleus X184 at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is
modern physics
1 Answer Available

Last Activity: 4 Years ago

question mark
SUBJECT: PROBLEM BASED ON LINE DETECTION.
Query: How to apply all the filters for line detection on the following piece of image (provided below)? Explain its Observations to comment on its results.
modern physics
1 Answer Available

Last Activity: 4 Years ago