Fluorescence -Multiple Choice Questions Quiz

Interactive MCQs on “Fluorescence”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is fluorescence?

(a) The emission of light of lower energy after absorbing higher energy light
(b) The emission of light of higher energy after absorbing lower energy light
(c) The emission of light with the same energy as the absorbed light
(d) The absorption of light without any emission

Question 2: Which of the following is NOT required for a substance to exhibit fluorescence?

(a) High temperature
(b) Absorption of light
(c) Emission of light
(d) Electronic transitions

Question 3: In fluorescence, the emitted light has:

(a) The same wavelength as the absorbed light
(b) A longer wavelength than the absorbed light
(c) A shorter wavelength than the absorbed light
(d) No relationship with the absorbed light's wavelength

Question 4: Which natural phenomenon is an example of fluorescence?

(a) The blue color of the sky
(b) The rainbow
(c) Bioluminescence in fireflies
(d) Red color of ripe strawberries

Question 5: Which substance is commonly used as a fluorescent dye in biomedical research?

(a) Mercury
(b) Sodium chloride
(c) Fluorescein
(d) Calcium carbonate

Question 6: Fluorescence is widely used in which imaging technique to visualize cellular structures and processes?

(a) X-ray imaging
(b) Magnetic Resonance Imaging (MRI)
(c) Fluorescence microscopy
(d) Positron Emission Tomography (PET)

Question 7: What is the phenomenon called when fluorescence continues even after the excitation light is turned off?

(a) Photoluminescence
(b) Phosphorescence
(c) Electroluminescence
(d) Chemiluminescence

Question 8: Which of the following is an example of a fluorescent molecule found in living organisms?

(a) Chlorophyll in plants
(b) Rust on metal surfaces
(c) Table salt (sodium chloride)
(d) Pure water

Question 9: The process of fluorescence is governed by which principle of quantum mechanics?

(a) Heisenberg's uncertainty principle
(b) Ohm's law
(c) Pauli exclusion principle
(d) Conservation of energy

Question 10: In fluorescence spectroscopy, the intensity of the emitted light is proportional to:

(a) The refractive index of the medium
(b) The temperature of the sample
(c) The concentration of the fluorescent substance
(d) The wavelength of the excitation light