{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

HW-2 - Rahman Tarique Homework 2 Due midnight Inst...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Rahman, Tarique – Homework 2 – Due: Sep 13 2007, midnight – Inst: Vandenbout 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Here’s the first of two homeworks from Chapter 12 in your textbook. 001 (part 1 of 1) 10 points What is the correct order of increasing fre- quency? 1. radio waves, infrared radiation, ultravio- let radiation, visible light 2. radio waves, visible light, ultraviolet radi- ation, infrared radiation 3. radio waves, infrared radiation, visible light, ultraviolet radiation correct 4. ultraviolet radiation, visible light, in- frared radiation, radio waves 5. infrared radiation, radio waves, visible light, ultraviolet radiation Explanation: radio waves < infrared radiation < visible light < ultraviolet radiation 002 (part 1 of 2) 10 points Light with a frequency of 7 . 07 × 10 14 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light? Correct answer: 424 . 328 nm. Explanation: ν = 7 . 07 × 10 14 Hz c = 3 × 10 8 m / s c = λ ν λ = c ν = 3 × 10 8 m / s 7 . 07 × 10 14 s - 1 = 4 . 24328 × 10 - 7 m · 10 9 nm 1 m = 424 . 328 nm 003 (part 2 of 2) 10 points When an electron beam strikes a block of copper, x-rays of frequency 2 . 72 × 10 19 Hz are emitted. What is the wavelength of these x-rays? Correct answer: 11 . 0294 pm. Explanation: ν = 2 . 72 × 10 19 Hz λ = c ν = 3 × 10 8 m / s 2 . 72 × 10 19 s - 1 = 1 . 10294 × 10 - 11 m · 10 12 pm 1 m = 11 . 0294 pm 004 (part 1 of 1) 10 points What kind of radiation causes molecules to vibrate? 1. microwave 2. infrared correct 3. visible 4. ultraviolet 5. x-rays Explanation: 005 (part 1 of 3) 10 points Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 570 nm. How much energy is emitted by an excited sodium atom when it generates a photon?
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern