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I was wondering if anyone could help me with these two problems?

 

 

physics
 Jun 29, 2016
 #1
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I solved number 5. I just need help with number 3 now..

 Jun 29, 2016
 #2
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(a)\(Snell's \) \(Law\): \(n\)\(1\)\(sin(\theta\)\(1\)\()=n\)\(2\)\(sin(\theta\)\(2\)\()\)

n1=1

n2=1.33

(b) \(\theta\)1 =\(\theta\)3=40º

\(\theta\)2=?

sin(40)=1.33sin(\(\theta\)2)

\(\theta\)2=arcsin[100sin(40)/133]

\(\theta\)2=28.90º

 

(c) f=speed of light in substance

c=speed of light in vacuum=3*\(10^8\)m/s

n=index of refraction

\(f={c\over n}\)

f=3.99*\(10^8\)m/s

 

(d) h=frequency

w=wavelength

f=speed of light in substance

f=hw

3.99*\(10^8\)m/s=7.85*1016/s*w

w=(3.99/7.85)*(108-16)=5.08*10-9m

 

(e) \(Snell's \) \(Law\): \(n\)\(1\)\(sin(\theta\)\(1\)\()=n\)\(2\)\(sin(\theta\)\(2\)\()\)

n1sin(\(\theta\)1)=1

sin(90)=1

1.33sin(\(\theta\)2)=1

\(\theta\)2=arcsin(100/133)=48.75º

 Aug 10, 2016

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