How to find threshold frequency?
Understand the Problem
The question is asking how to determine the threshold frequency, which is the minimum frequency required to eject electrons from a material when it is exposed to light, often in the context of the photoelectric effect. To solve this, we typically use the equation relating energy and frequency, specifically E = hf, where E is the energy needed to eject an electron, h is Planck's constant, and f is the frequency.
Answer
f0 = W0/h
To find the threshold frequency, use the formula f0 = W0/h, where W0 is the work function and h is Planck's constant.
Answer for screen readers
To find the threshold frequency, use the formula f0 = W0/h, where W0 is the work function and h is Planck's constant.
More Information
The threshold frequency is crucial in understanding the photoelectric effect, where electrons are ejected from a material upon exposure to light.
Tips
Ensure units are consistent when using the formula. Commonly, Planck's constant is in joule-seconds (Js), so the work function should be in joules.
Sources
- Calculate the threshold frequency for a metal with a work function of ... - mytutor.co.uk
- How do you find threshold frequency? (given wavelength and KE of ... - physicsforums.com
- Threshold Frequency Calculator - calculator.academy
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