University Physics Volume 3
17th Edition
ISBN: 9781938168185
Author: William Moebs, Jeff Sanny
Publisher: OpenStax
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Textbook Question
Chapter 1, Problem 78AP
Suppose you have an unknown clear substance immersed in water, and you wish to identify it by finding its index of refraction. You arrange to have a beam of light enter it at an angle of 45.0°, and you observe the angle of refraction to be 40.3°. What is the index of refraction of the substance and its likely identity?
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You send a beam of light from a material with index of refraction 1.23 into an unknown material. In order to help identify this
material, you determine its index of refraction by measuring the angles of incidence and refraction for which you find the values
40.5° and 38.1°, respectively. What is the index of refraction n of the unknown material?
n =
Using filters, a physicist has created a beam of light consisting of three wavelengths: 400 nm (violet), 500 nm (green), and 650 nm (red). She aims the beam so that it passes through air and then enters a block of crown glass. The beam enters the glass at an incidence angle of
θ1 = 31.6°.
The glass block has the following indices of refraction for the respective wavelengths in the light beam.
wavelength (nm)
400
500
650
index of refraction
n400 nm = 1.53
n500 nm = 1.52
n650 nm = 1.51
(a)
Upon entering the glass, are all three wavelengths refracted equally, or is one bent more than the others?
400 nm light is bent the most500 nm light is bent the most 650 nm light is bent the mostall colors are refracted alike
(b)
What are the respective angles of refraction (in degrees) for the three wavelengths? (Enter each value to at least two decimal places.)
(i)
θ400 nm
°
(ii)
θ500 nm
°
(iii)
θ650 nm
°
Suppose you have an unknown clear substance immersed in water,
and you wish to identify it by finding its index of refraction. You
arrange to have a beam of light enter it at an angle of 49.0°, and you
observe the angle of refraction to be 37°. The index of refraction of
water is 1.33.
What is the index of refraction of the substance?
Chapter 1 Solutions
University Physics Volume 3
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