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Title: A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and ... Post by: as11916 on Jan 17, 2017 A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and continues in the sheet at an angle of 23.0° with the normal. What is the index of refraction of the plastic?
Title: Re: A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal ... Post by: dtimmons95 on Jan 18, 2017 Hi, this has been asked before.
Anyway, apply snells law as na sin A -= nb sin B so nb = 1 * sin 32/sin 23 nb = 1.356 |