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Math Help - An Optician Seeking Assistance: What are the answers here?

  1. #1
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    An Optician Seeking Assistance: What are the answers here?

    Hello, all

    First time poster, long-time community follower. Here's the deal: I'm currently studying to become an optician, and, at present we are studying Light. When it comes to the theory-side of things, i'm actually getting the hang of it all, but... when it comes to the mathematics... Well, I need help. This place seems to be the Internet's mecca when it comes to all things Math, so I figured I'd see if any of you guys and girls could post-up some answers (with working-out) to the following questions I'm having issue with. Here are the questions:

    1/ If the angle of incidence of a ray of light entering a rectangular glass block is 42 degrees and the angle of refraction is 26 degrees, what is the refractive index of the glass to air?

    2/Calculate the angle of refraction which results when a light ray is incident at 35 degrees to the surface of a rectangular block of material of refractive index n=1.614.

    3/ If light strikes the surface of a block of transparent material at an angle of incidence of 42.4 degrees and is deviated by 19.4 degrees, what is the refractive index of the material?

    4/ Calculate the critical angle for an interface between a high index plastic material (n=1.602) and perspex (n=1.490).

    5/ Light traveling inside a block of optical material makes an angle of 36.5 degrees to the normal. The angle of incidence is 67.48 degrees. What is the speed of light inside the material?

    6/ Calculate the amount of deviation which occurs when a light ray strikes the surface of a block of optical material at 38 degrees and slows down to a speed of 1.91x10(to the power of 8) m/sec.

    7/ Calculate the path of a ray of light approaching the inside surface of a block of material (n-1.654) at an angle of 26.7 degrees.

    You help with these questions would be of great assistance to me. Thank you very much in advance!
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  2. #2
    MHF Contributor

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    Re: An Optician Seeking Assistance: What are the answers here?

    I would suggest you review the definitions. For example, the answer to (1) is immediate from the definition of "refractive index".
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  3. #3
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    Re: An Optician Seeking Assistance: What are the answers here?

    Sorry, can't help: lost my glasses...
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  4. #4
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    Re: An Optician Seeking Assistance: What are the answers here?

    Quote Originally Posted by Wilmer View Post
    Sorry, can't help: lost my glasses...
    The go see an optician!
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