Relating Properties of Light Assume the visible yellow light emitted by the sun has a wavelength of 5.8 x 10-7 m. What is the frequency of this light? 1. Read and Understand What information are you given? wavelength: = λ =5.8 x 10-7 m 2. Plan and Solve What unknown are you trying to calculate? frequency=f What other information do you need to use? speed of light = c = 3.0 x 108 m/s What relationship can you use? speed of light = c = af Rearrange the equation to solve for the unknown. f = £ Replace each variable and constant with its known value. 3.0 x 108 m/s = 5.2 x 10¹4 Hz 5.8 x 107 m f = SOYD BLORA 50130 3. Look Back and Check Is your answer reasonable? A frequency around 1014 Hz is reasonable for visible light. The units of meters cancel, leaving 1/s or Hz, as it should. Math Practice On a separate sheet of paper, solve the following problems. 1. Ultraviolet rays from the sun can cause sunburn and skin damage. What is the wavelength of ultraviolet rays that have a frequency of 8.6 x 10¹4 Hz? S

Relating Properties of Light Assume the visible yellow light emitted by the sun has a wavelength of 5.8 x 10-7 m. What is the frequency of this light? 1. Read and Understand What information are you given? wavelength: = λ =5.8 x 10-7 m 2. Plan and Solve What unknown are you trying to calculate? frequency=f What other information do you need to use? speed of light = c = 3.0 x 108 m/s What relationship can you use? speed of light = c = af Rearrange the equation to solve for the unknown. f = £ Replace each variable and constant with its known value. 3.0 x 108 m/s = 5.2 x 10¹4 Hz 5.8 x 107 m f = SOYD BLORA 50130 3. Look Back and Check Is your answer reasonable? A frequency around 1014 Hz is reasonable for visible light. The units of meters cancel, leaving 1/s or Hz, as it should. Math Practice On a separate sheet of paper, solve the following problems. 1. Ultraviolet rays from the sun can cause sunburn and skin damage. What is the wavelength of ultraviolet rays that have a frequency of 8.6 x 10¹4 Hz? S

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

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12-1
Chapter 27 Light
Relating Properties of Light
Assume the visible yellow light emitted by the sun has a wavelength of
5.8 x 10-7 m. What is the frequency of this light?
1. Read and Understand
What information are you given?
wavelength = λ = 5.8 x 10-7 m
2. Plan and Solve
What unknown are you trying to calculate?
frequency=f
What other information do you need to use?
speed of light = c = 3.0 x 108 m/s
What relationship can you use?
speed of light = c = 2f
Rearrange the equation to solve for the unknown.
f = £
Replace each variable and constant with its known value.
3.0 x 108 m/s
5.8 x 107 m
f =
= 5.2 x 10¹4 Hz
SOLD
3. Look Back and Check
Is your answer reasonable?
A frequency around 10¹4 Hz is reasonable for visible light. The units of
meters cancel, leaving 1/s or Hz, as it should.
Math Practice
On a separate sheet of paper, solve the following problems.
1. Ultraviolet rays from the sun can cause sunburn and skin damage. What is
the wavelength of ultraviolet rays that have a frequency of 8.6 x 10¹4 Hz?
Cha
S
T

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