Hw 2 answers - Iype Shelby Homework 2 Due midnight Inst Vandenbout This print-out should have 17 questions Multiple-choice questions may continue

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

View Full Document Right Arrow Icon
Iype, Shelby – 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 – fnd all choices beFore answering. The due time is Central time. Here’s the frst oF two homeworks From Chapter 12 in your textbook. 001 (part 1 oF 1) 10 points What is the correct order oF decreasing Fre- quency? 1. radio waves, inFrared radiation, visible light, ultraviolet radiation 2. ultraviolet radiatioin, visible light, in- Frared radiation, radio waves correct 3. visible light, ultraviolet radiation, in- Frared radiation, radio waves 4. radio waves, visible light, ultraviolet radi- ation, inFrared radiation 5. inFrared radiation, radio waves, visible light, ultraviolet radiation Explanation: ultraviolet radiation > visible light > inFrared radiation > radio waves 002 (part 1 oF 2) 10 points Light with a Frequency oF 7 . 21 × 10 14 Hz lies in the violet region oF the visible spectrum. What is the wavelength oF this Frequency oF light? Correct answer: 416 . 089 nm. Explanation: ν = 7 . 21 × 10 14 Hz c = 3 × 10 8 m / s c = λ ν λ = c ν = 3 × 10 8 m / s 7 . 21 × 10 14 s - 1 = 4 . 16089 × 10 - 7 m · 10 9 nm 1 m = 416 . 089 nm 003 (part 2 oF 2) 10 points When an electron beam strikes a block oF copper, x-rays oF Frequency 9 . 3 × 10 18 Hz are emitted. What is the wavelength oF these x- rays? Correct answer: 32 . 2581 pm. Explanation: ν = 9 . 3 × 10 18 Hz λ = c ν = 3 × 10 8 m / s 9 . 3 × 10 18 s - 1 = 3 . 22581 × 10 - 11 m · 10 12 pm 1 m = 32 . 2581 pm 004 (part 1 oF 1) 10 points What kind oF radiation causes molecules to vibrate? 1. inFrared correct 2. visible 3. ultraviolet 4. microwave 5. x-rays Explanation: 005 (part 1 oF 3) 10 points Sodium vapor lamps, used For public lighting, emit yellow light oF wavelength 580 nm. How much energy is emitted by an excited sodium
Background image of page 1

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

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

This note was uploaded on 03/30/2009 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.

Page1 / 4

Hw 2 answers - Iype Shelby Homework 2 Due midnight Inst Vandenbout This print-out should have 17 questions Multiple-choice questions may continue

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online