Chapter 26. Maximum kinetic energy of an electron in the photoelectric effect (26-1)

Question

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Question

d4oOlCD9mCUkdKHpWg8+7Ch+4q8jPUl2LXWuyrv4722c9oWf5K+fs5/PTHbYPdIJOwdtww==
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Question

9V7zA2r+45hltyKZsB7iWB1XUaU+Bo3To3dvm8/MQ9dTJZyjUy2GreGN+zE6eEDTnOOSHiO5dY+k2qUTjjxiSFYVl9G3Vq/SFWvnlA==
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Question

lO22s9WXxOIWyt/tFtNeLU0G7JipMTCws9/X1bgYaV6zxU8Qk7akWQ==
{"title":"Maximum kinetic energy of an electron ejected from a material by the photoelectric effect","description":"Wrong","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"10,16,12,16\"},{\"shape\":\"poly\",\"coords\":\"144,22\"},{\"shape\":\"rect\",\"coords\":\"1,2,35,45\"}]"} {"title":"Work function of the material","description":"Incorrect","type":"incorrect","color":"#ffff00","code":"[{\"shape\":\"rect\",\"coords\":\"244,6,279,47\"}]"} {"title":"Frequency of the light used to illuminate the material","description":"Wrong","type":"incorrect","color":"#00ff00","code":"[{\"shape\":\"rect\",\"coords\":\"177,2,201,56\"}]"} {"title":"Planck’s constant","description":"Correct!","type":"correct","color":"#ff0000","code":"[{\"shape\":\"rect\",\"coords\":\"149,4,177,51\"}]"}

Review

Equation 26-1 tells us that that a graph of \(K_{\mathrm{max}}\) as a function of the light frequency \(f\) should be a straight line of slope \(h\) (see Figure 26-3). Since kinetic energy can never be negative, Equation 26-1 also tells us that electrons will be emitted only if \(hf - \Phi_0 > 0\).