Log in
Physics
1
answer
0
watching
36
views

You send a beam of light from a material with index of refraction 1.21 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 41.9° and 37.3° respectively. What is the index of refraction of the unknown material?

Watch
1
answer
0
watching
36
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Mohd Talib
Mohd TalibLv10
29 Sep 2020

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A beam of white light makes an angle of incidence of 38° with a glass prism of index of refraction of 1.5 and refracting angle of 60°. Through what angle is the ray deviated by the prism? Does this represent minimum deviation?

You will be utiizing a basicoptic system.

The index of refraction of theplastic cylindrical lens depends on wavelength. Choose an anglewhich gives a good color separation and measure the index ofrefraction for blue and red light.

Question:How big is the difference in indices of refraction? How good is theapproximation that n is constant for thismaterial?

If this question doesnt make sense..then just answer ittheoretically speaking. That is how would we go about checkingwhether or not it conforms with the n as the constant for thematerial... Thanks!

Background info:

ThePhysics

The Law ofReflection

The law of reflection states that for a plane mirror, the angle ofincidence is equal to the angle of reflection, and that the tworays lie in a plane.

r

normal

. A light ray perpendicular to the surface has an angle ofincidence 0°.

The Law of Refraction –Snell’s Law

A ray of light passing from one substance (index ofrefraction

n1)into another (index of refraction n

2) across a plane boundary will be refracted. The angle the raymakes in one medium will be related to the angle in the secondmedium by the equation below, and that all rays lie in aplane.

(2)

Total InternalReflection

A ray incident on a medium with lower index of refraction willbe

totally internally reflected if sin θ1> n2/n1.There will be no transmitted beam for this incident angle. Ameasurement of the critical angle for total internalreflection can be used to determine the index of refraction of the substance.If n

2 = 1 (air), then the critical angle is:

sin θc = 1/

n

1. (3)

Polarization byReflection – Brewster’s Angle

If the angle between the reflected and refracted rays is 90°,then

tan θ

B = n2/n

1. (4)

At this angle, only light with polarization out of the plane ofreflection and refraction will be reflected. The reflected lightwill be completely polarized.

Figure3.

Refractionof Light Rays

Figure2.

Incidentand Reflected Rays

(1)

Always measure the angles with respect to the surface

a) For an image that is in front of a mirror, is the imagedistancepositive or negative?
b) Given the image distance, what additional information isneededto determine the focal length? Explain.
c) For an inverted image is the image height positiveornegative?
d) Given the object and image heights and a statement as towhetherthe image is upright or inverted, what additionalinformation isneeded to determine the object distance?
e) A small statue has a height of 3.5 cm and is placed in front ofaconcave mirror. The image of the statue is inverted, 1.5 cmtall,and is located 13 cm in front of the mirror. Find the focallengthof the mirror.


a) The drawing shows a ray of light traveling throughthreematerials whose surfaces are parallel to each other. Therefractedrays (but not the reflected rays) are shown as the lightpassesthrough each material. Taking into account the relative sizesofthe angles of incidence and refraction, rank thematerialsaccording to their indices of refraction, greatest first.Providereasons for your rankings.
b) A ray of light strikes the a-b interface ata50.0o angle of incidence. The index of refractionofmaterial a is na = 1.20. The anglesofrefraction in materials b and care,respectively, 45.0o and 56.7o. Findtheindices of refraction in these two media




Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in