Question
Medium
Solving time: 4 mins
Lifetimes of the molecules in the excited state are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is , calculate the energy of the source.
Found 7 tutors discussing this question
Discuss this question LIVE
11 mins ago
Text solutionVerified
Given Data: Duration seconds
Number of emitted photons
Formulas to be used:
Energy
Where N = number of emitted photons during the pulse source
Planck’s constant
Frequency of source
Calculation:
Step 1: Find frequency of source
Step 2: Substituting
In the energy formula, we get ,
Energy J
Was this solution helpful?
10
Share
Report
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
60, 000+ Expert tutors
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Essay review
Get expert feedback on your essay
Schedule classes
High dosage tutoring from Dedicated 3 experts
Practice more questions from Chemistry Part-I (NCERT)
Q1
In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of from the radiations of 600 nm, calculate the number of photons received by the detector.
Q2
Lifetimes of the molecules in the excited state are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is , calculate the energy of the source.
Q3
The work function for the caesium atom is . Calculate
View all(a) the threshold wavelength and
(b) the threshold frequency of the radiation. If the caesium element is irradiated with a wavelength of , calculate the kinetic energy and the velocity of the photoelectron.
Practice questions from Chemistry Part-I (NCERT)
Question 1
Medium
Views: 6,517
Calculate the value of n if the transition is observed at 1285 nm. Find the region of the spectrum.
Question 2
Medium
Views: 5,454
Question 3
Easy
Views: 5,655
(b) How many electrons will be present in the sub-shells having value of -1/2 for n = 4 ?
Question 4
Medium
Views: 5,709
(ii) Calculate the radius of Bohr's fifth orbit for the hydrogen atom.
Practice more questions from Structure of Atom
Question 1
Easy
Views: 5,758
Question 2
Medium
Views: 5,559
Practice questions on similar concepts asked by Filo students
Question 1
Views: 5,482
Question 3
Views: 5,076
Question 4
Views: 5,825
Stuck on the question or explanation?
Connect with our Chemistry tutors online and get step by step solution of this question.
231 students are taking LIVE classes
Question Text | Lifetimes of the molecules in the excited state are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is , calculate the energy of the source. |
Updated On | Aug 4, 2022 |
Topic | Structure of Atom |
Subject | Chemistry |
Class | Class 11 |
Answer Type | Text solution:1 Video solution: 1 |
Upvotes | 68 |
Avg. Video Duration | 5 min |