# hw1 - Killough Ian – Homework 1 – Due Sep 8 2006 11:00...

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Unformatted text preview: Killough, Ian – Homework 1 – Due: Sep 8 2006, 11:00 pm – Inst: Donna C Lyon 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. This HW assignment is due Thursday, September 7, by 11PM. 001 (part 1 of 1) 10 points What is the correct order of increasing en- ergy? 1. x-rays, γ-rays, microwaves, visible light, ultraviolet light 2. microwaves, ultraviolet light, visible light, x-rays, γ-rays 3. ultraviolet light, visible light, microwaves, x-rays, γ-rays 4. microwaves, x-rays, γ-rays, visible light, ultraviolet light 5. microwaves, visible light, ultraviolet light, x-rays, γ-rays correct Explanation: microwaves < visible light < ultraviolet light < x-rays < γ-rays 002 (part 1 of 1) 10 points In quantum mechanics the intensity of a light beam is interpreted as the 1. square of the amplitude of the light wave. 2. frequency of the light times Planck’s con- stant ( h ). 3. energy µ E = h c λ ¶ of the photon. 4. number of photons passing a point per second times the energy of each photon. cor- rect 5. speed of light ( c ). Explanation: Comprehension 003 (part 1 of 1) 10 points The wavelength of light with a frequency of 3 . 30 × 10 14 s- 1 is 1. 909 nm. correct 2. 650 nm. 3. 450 nm. 4. 200 nm. Explanation: 004 (part 1 of 1) 10 points Which of the following statements is true re- garding electromagnetic radiation? 1. The frequency of electromagnetic radia- tion determines how fast it travels. 2. Electromagnetic radiation with a wave- length of 400 nm has a frequency that is lower than that with a wavelength of 600 nm. 3. Electromagnetic radiation with a wave- length of 400 nm travels faster than that with a wavelength of 600 nm. 4. Electromagnetic radiation with a wave- length of 600 nm travels faster than that with a wavelength of 400 nm. 5. Electromagnetic radiation with a wave- length of 600 nm has a frequency that is lower than that with a wavelength of 400 nm. cor- rect Explanation: v = f λ , so λ = 1 f . Higher wavelengths cor- respond to lower frequencies, and vice versa ....
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hw1 - Killough Ian – Homework 1 – Due Sep 8 2006 11:00...

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