5 Questions
What happens when LEDs are 'forward biased'?
They emit radiation (photons) of visible wavelengths
What is the purpose of the lab activity described in the text?
To determine Planck’s constant by measuring the turn-on voltage of LEDs
What is approximately equal to the energy of the emitted photon in LEDs?
eVt
What does the turn-on voltage of LEDs represent?
The minimum voltage required to cause current to flow and photons to be emitted
Why do light-emitting diodes require a series load resistor?
To prevent thermal runaway and unlimited forward current
Test your understanding of determining Planck's constant using LEDs with this quiz. Explore the concept of forward biasing and the relationship between voltage and light emission. Sharpen your knowledge of the physics behind LED functioning and its application in experimental determination of Planck's constant.
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