Knight_ch38

Knight_ch38 - Chapter 38 The work function of metal A is...

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Chapter 38
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The work function of metal A is 3.0 eV. Metals B and C have work functions of 4.0 eV and 5.0 eV, respectively. Ultraviolet light shines on all three metals, creating photoelectrons. Rank in order, from largest to smallest, the stopping voltages for A, B, and C. 1. V A > V B > V C 2. V C > V B > V A 3. V A = V B = V C
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The work function of metal A is 3.0 eV. Metals B and C have work functions of 4.0 eV and 5.0 eV, respectively. Ultraviolet light shines on all three metals, creating photoelectrons. Rank in order, from largest to smallest, the stopping voltages for A, B, and C. 1. V A > V B > V C 2. V C > V B > V A 3. V A = V B = V C
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The intensity of a beam of light is increased but the light’s frequency is unchanged. Which of the following is true? 1. The photons travel faster. 2. Each photon has more energy. 3. There are more photons per second. 4. The photons are larger.
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light’s frequency is unchanged. Which of the following is true? 1. The photons travel faster. 2. Each photon has more energy. 3. There are more photons per second. 4. The photons are larger.
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This note was uploaded on 04/08/2008 for the course PHYS 270 taught by Professor Drake during the Spring '08 term at Maryland.

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Knight_ch38 - Chapter 38 The work function of metal A is...

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