What is the minimum frequency of light required to eject electrons from a metal

What is the minimum frequency of light required to eject electrons from a metal surface in the photoelectric effect?

What is the minimum frequency of light required to eject electrons from a metal surface in the photoelectric effect?

Correct Answer: f = E/h

Step 1: Understand that the photoelectric effect is when light hits a metal surface and can cause electrons to be ejected.
Step 2: Know that each metal has a specific energy level needed to release electrons, called the work function (E).
Step 3: Learn the equation that relates the work function to the frequency of light: E = hf.
Step 4: Identify that 'h' is Planck's constant, which is a specific number (approximately 6.626 x 10^-34 Joule seconds).
Step 5: Rearrange the equation to find the frequency (f): f = E/h.
Step 6: To find the minimum frequency needed to eject electrons, you need to know the work function of the specific metal.
Step 7: Plug the work function value into the rearranged equation to calculate the minimum frequency.

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