2. What is the mystery medium?The wavelength of He-Ne laser light traveling through air is 633 nm.The wavelength of He-Ne laser light traveling through the mysterymedium is 329 nm.a. What is the index of refraction of the medium?b. Based on the table below, what is the most likely medium?Materials at 20°C for light with a vacuum wavelength of 589 nm.MaterialdiamondfluoriteMaterialbenzene1.501carbon disulfide 1.628carbontetrachlorideethanolglycerinewater (fresh)2.4191.4341.461glass(crown)glass (flint) 1.661.3611.473 ice (0°C) 1.3091.333 polystyrene 1.491.52Materialplexiglasquartz(crystalline)1511.544quartz (fused) 1.458sodium chloride 1.544zircon1.923air1.00029We can find out what themystery medium is bymeasuring the wavelength oflight in the medium andcalculating its index ofrefraction.n =2<Skills: Relatechange ofwavelength of lightin a medium(lambda) to theindex of refraction(n) of the material.

Given Wavelength in air λ0 = 633 nm = 633×10-9 m Wavelength in medium λ = 329 nm = 329×10-9 m

Answered: The wavelength of He-Ne laser light…

The wavelength of He-Ne laser light traveling through air is 633 nm. The wavelength of He-Ne laser light traveling through the mystery medium is 329 nm.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter27: Wave Optics

Section: Chapter Questions

Problem 60PE: (a) What is the minimum angular spread of a 633-nm wavelength He-Ne laser beam that is originally...

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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

2. What is the mystery medium?
The wavelength of He-Ne laser light traveling through air is 633 nm.
The wavelength of He-Ne laser light traveling through the mystery
medium is 329 nm.
a. What is the index of refraction of the medium?
b. Based on the table below, what is the most likely medium?
Materials at 20°C for light with a vacuum wavelength of 589 nm.
Material
diamond
fluorite
Material
benzene
1.501
carbon disulfide 1.628
carbon
tetrachloride
ethanol
glycerine
water (fresh)
2.419
1.434
1.461
glass
(crown)
glass (flint) 1.66
1.361
1.473 ice (0°C) 1.309
1.333 polystyrene 1.49
1.52
Material
plexiglas
quartz
(crystalline)
151
1.544
quartz (fused) 1.458
sodium chloride 1.544
zircon
1.923
air
1.00029
We can find out what the
mystery medium is by
measuring the wavelength of
light in the medium and
calculating its index of
refraction.
n =
2<
Skills: Relate
change of
wavelength of light
in a medium
(lambda) to the
index of refraction
(n) of the material.

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