Question

The fluorescence emission occurs at longer wavelengths than the absorption. Explain with the help of an energy level diagram

08 Mar 2018
Answer :
Word Count : 517

Absorption of light occurs very quickly (approximately a femtosecond, the time necessary forthe photon to travel a single wavelength) in discrete amounts termed quanta and corresponds to excitation of the fluorophore from the ground state to an excited state. Likewise, emission of a photon through fluorescence or phos

phorescence is also measured in terms of quanta. The energy in a quantum ( Planck's Law ) is expressed by the equation:

E = hn = hc/l

where E is the energy, h is Planck's constant, n and l are the frequency and wavelength of the incoming photon, and c is the speed of light. Planck's Law dictates that the radiation

_____ ________ _____ ____ ____ ____ ____.
_________ __________ ________ ___ ___ _________.
____ ________ _____ ___ ________ __________ ______ _________ ______ ____ ____ ______.
________ ________ _______ ______ _________ _________ __________ __________ _______ _______ _________ _________.
_____ _________ ________ ______ _________ __________ _____.
___ ______ ____ ______ _________ _______ _______.
____ ________ ________ __________ _____ ______ _____ _________ _____ _____ ________.
_________ ______ ____ __________ ______ ____ __________ __________ ______ ___ _____.
_______ ___ ________ __________ ______ ______ _____ __________ ___ ________ __________.
_______ ___ ________ ______ ________ _________ _____ ______ ______.
_____ _______ ___ ____ ______ ___ ____ ______ ______.
_______ _____ _________ ______ __________ ________ __________ _________ _____ ______ _____.
_________ ____ _________ _________ _____ ____ ____.
______ _____ ______ ________ _______ ________ ______ __________ _______ _____ _______ ________.
______ ___ _____ _____ __________ _____.
_________ ____ _________ ______ ____ ______ _____ ______ ______ _____ ___.
____ ________ _______ _________ ________ ___ _______ ________ __________ ______ ______.
_____ ________ ________ _____ ____ ____.
___ _____ _______ _________ _________ ____ __________ _____ _____ ________ __________ ______.
__________ __________ ________ __________ ___ __________ ______.
____ ____ __________ ___ _______.
_____ ___ ________ _____ __________.
_________ _____ ________ ___ ____ _____ _________ ____ ___ _______ ________ ____.
___ _____ _____ ____ ____.
___ ________ ______ ________ _____ _________ ____ _______ __________ _________ ____.
_________ ____ _____ _______ __________ ______.
___ _____ ___ _________ ______ ________ ___.
_________ ____ ________ ______ ___.
____ _____ _________ ______ ____.
_____ ____ _______ ________ ______ ____ ______ _______.
____ __________ _____ __________ _______ _________.
_____ _______ ______ ____ _____ __________ _________ _______ __________ _______ _____.
_______ _______ ____ _______ ________.
_________ _________ ____ _________ __________ __________ ________.
____ _______ ________ _______ _____ ______ __________ ______ _____ ______ _______ _________.
____ _________ _______ ____ _________.
__________ ______ _______ ______ ______ ___ ____ ___ _____ _________ _____.
_________ __________ ______ __________ ___ ____ ____ _________.
____ ___ _______ _________ __________ _____ _________ _________.
_____ _________ ________ _____ _________ _______ ______ ____ __________ ___.
_______ _______ _______ _________ ____ ____.
___ ______ __________ _____ ________ _____ ____.
_____ ________ _____ _____ ______ ______ ________ ________.
___ _____ ___ _______ _____ ____ _______ _______ __________ _____ _____.
____ _____ ____ ___ ______ ________ ________ _________ ________ _______.
_______ __________ ________ __________ _______ ______ ______.
________ ____ ________ ____ ________ ___ ____ ______ ____ _______ _________.
________ ______ _________ _____ ___ ____ ________ _______ _____.
_______ ______.
IGNOU ACADEMY
Your IGNOU journey, made easier.
  • Solved Assignments
  • Study Notes
  • Guess Papers
  • Question Papers
Call Us WhatsApp
STUDY • PREPARE • SUCCEED
Skip in 10
Related Questions

Draw the block diagram for the experimental set up for the fluorescence spectral measurement. In what way is it different from that for the absorption measurement?

How can IR spectrum be used to check the authenticity of an organic compound?

What is meant by isotopic peaks in mass spectrum? What is their importance?

The visible spectra for the lanthanide ions consist of narrow bands whereas for the transition metal ions, these are broad. Explain

Explain the principle of GFAAS and list its advantages over FAAS.

A solution of benzene in hexane taken in a cuvette having a path length of 2.0 cm showed an absorbance of 0.048 at 256 nm. Determine the concentration of given benzene solution.

Describe the mechanisms of Stokes direct line fluorescence and resonance fluorescence. In what way are the measurements based on direct line fluorescence better than that based on resonance fluorescence?

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers
Login
Top
📞
Call Support Instant phone assistance IGNOU MCH 3 2018 - The fluorescence emission occurs at longer wavelengths than the absorp | IGNOU Academy
→
🟢
WhatsApp Chat Fast live messaging
→
Email Us Business enquiries & support
→