Quiz%201%20Fall%202010

# Quiz%201%20Fall%202010 - Version 001 Quiz 1 sparks(50990...

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Version 001 – Quiz 1 – sparks – (50990) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Sparkslight001 001 1.0points Consider two photons: Photon X with energy 1 . 0 × 10 - 18 J and photon Y with energy 1 . 0 × 10 - 17 J. Which statement is true? 1. X has the longer wavelength and higher frequency. 2. X has the shorter wavelength and higher frequency. 3. You cannot determine relative wave- lengths and frequencies just given these en- ergies. 4. X has the longer wavelength and lower frequency. correct 5. X has the shorter wavelength and lower frequency. Explanation: Sparkslight002 002 1.0points Consider a photon of light with a wave- length of 80 nm. What is the energy of this photon? 1. 2 . 5 × 10 - 27 J 2. 3 . 75 × 10 6 J 3. 8 . 3 × 10 - 28 J 4. 2 . 5 × 10 - 18 J correct 5. 3 . 75 × 10 15 J Explanation: Sparksphotoelectric001 003 1.0points A certain metal has a work function of 8 × 10 - 19 J. You shine light with a frequency of 4 × 10 15 Hz at this metal surface. What would you expect to happen?

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