373 Hw2 crib

# 373 Hw2 crib - Crib 2 1 The photoelectric formula is This...

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Crib 2 1. The photoelectric formula is . This is equivalent to the generic linear equation , so plotting the kinetic energy, , as a function of frequency, , will yield a line with slope of Planck’s constant, . 2. The process in this problem is the photoelectric effect. The binding energy is then . Converting the wavelength to frequency, Solving for giving 3a. The amount of energy hitting the earth per second which is the rate work could theoretically be obtained from sunlight shining on a square meter. b. To calculate the number of photons striking 1 square meter of the earth in one second, we calculate the individual energy contribution from each photon then divide into the total energy:

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c. If we know the power output at a certain distance from the sun and assume uniform distribution, then the total power is obtained by calculating the power radiating in all directions. This is achieved by calculating the output in terms of the surface area of a shell encompassing the sun.
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