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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define fluorescence. How is it different from phosphorescence?
💡 Hint: Consider the duration of light emission for both phenomena.
Question 2
Easy
What is Stokes shift?
💡 Hint: Think about how energy is related to wavelength.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is fluorescence?
- Emission of light after absorption of radiation
- Absorption of light without any emission
- Emission of radiation without prior absorption
- None of the above
💡 Hint: Think about what happens to a molecule after it absorbs light.
Question 2
True or False: A higher quantum yield indicates more efficient fluorescence.
- True
- False
💡 Hint: Consider what a value less than 1 means.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A fluorophore emits only 30% of the light it absorbs as fluorescence. If it absorbs 250 photons, how many photons are emitted?
💡 Hint: How do you use percentages in calculations?
Question 2
Given a measured intensity of 50 counts for a standard concentration of 10 mg/L, what would be the expected intensity for a concentration of 25 mg/L under the same conditions?
💡 Hint: Consider how intensity proportionality works with concentration in a linear relationship.
Challenge and get performance evaluation