2. 3. 4. Please help me thanks. Useful constants and hint example: Light with th

Question

2.

3.

4.

Please help me thanks.

Useful constants and hint example: Light with the wavelength of 450 nm was shone on a plate made from cesium metal with its work function of 2.14e/, and electrons were produced. You will be able to stop the electrons by applying the stopping (backing) voltage of A monochromatic light is incident on the surface of a metal with work function W = 4.3 eV. If a stopping potential V = -1.3 V is required to make the photocurrent zero, what is the wavelength? Express your answer to the nearest units shown. In order for a photon of light to eject an electron from a metal's surface in the photoelectric effect, the light Einstein's photoelectric equation may be written as hf = W + 14 rnvmax2. Identify the terms:

Explanation / Answer

1)-0.62V

2)221.78nm

3) 1st second and fourth

4) W=work function energy

hf=photon energy

1/2mv^2=maximum kinetic enegy of emitted photoelectron.

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