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# Physics problems?

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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