http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
http://www.physicstutorials.org/home/optics/refraction-of-light/the-laws-of-refraction
http://physicsnet.co.uk/a-level-physics-as-a2/waves/refraction/
http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/totint.html
Madinat Al Sultan Qaboos PVT School
Under the supervision of ministry of education
Semester Two
Home Work -4 Reflection and
refraction- 2016/ 2017
Name: _______________ Subject: PHYSICS
Date: ___________ Class
: 12A and 12B
---------------------------------------------------------------------------------------------------------------------------------------------------
1.Light
enters an optic fiber core from air as
shown in the figure.
a)
Calculate the critical angle for the core-coating interphase. (1)
b)
Calculate θ if θ represents the the
largest angle of entry for which Total internal reflection takes place in the
core. (2)
c)
Explain why the refractive index of the
core of an optic fiber should be more than that of the cladding. (1)
d.
Calculate the speed of light in the core.(1)
Madinat Al Sultan Qaboos PVT
School
Under the supervision of ministry of education
Semester Two
Home Work -5 Reflection and
refraction- 2016/ 2017
Name: _______________ Subject: PHYSICS
Date: ___________ Class
: 12A and 12B
---------------------------------------------------------------------------------------------------------------------------------------------------
Light
enters an optic fiber core from air as
shown in the figure at an angle 40˚.
a.
Calculate angle of refraction inside the core θ
b.
Calculate angle θ2
c.
Calculate the critical angle for the core coating interphase.
d.
What is the largest angle of entry for Total internal reflection to take place?
e.
Why doesn’t Total internal Reflection take place when the angle of entry
exceeds this angle?
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