Parts a-c, answer to a is incorrect A beam of light traveling through a liquid (

Question

Parts a-c, answer to a is incorrect A beam of light traveling through a liquid (of index of refraction n_1 =1.26) is incident 0on a surface at an angle theta_1 = 57digree with respect to the normal to the surface It passes into the second medium and refracts at an angle of theta_2 = 69.5degree with respect to the normal. (a) What is the index of refraction of the second material? (b) what is the light's velocity in medium 1. in meters per second? (b) What is the light's velocity as medium 2 in meters per second?

Explanation / Answer

Ans (a) By Snell's law of refraction

n1*sin theta=n2*sin fie

1.26*sin57=n2*sin69.5

n2=refravtive index of other medium=1.13

(b) light velocity in medium 1

v1=c/n1=3*10^8/1.26

v1=2.38*10^8 m/s

(c) light velocity in medium 2

v2=c/n2=3*10^8/1.13

v2=2.65 m/s

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