A beam of EMW in air strikes a sheet of a glass at 75 degrees with the normal in air. You observe that red light makes an angle of 38.1 degr

Question

A beam of EMW in air strikes a sheet of a glass at 75 degrees with the normal in air. You observe that red light makes an angle of 38.1 degrees with the normal in the glass, while violet light makes a 36.7 degree angle.
1. What are the indexes of refraction of this glass for these colors of light?
Answer in the order indicated. Separate your answers with a comma.
2. What are the speeds of red and violet light in the glass?

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Diễm Kiều 4 years 2021-07-26T17:05:29+00:00 1 Answers 11 views 0

Answers ( )

  1. mocmien2
    0
    2021-07-26T17:06:32+00:00
    Reply

    Answer:

    a) 1.57, 1.61

    B 1.91×10^8m/s , 1.86 x 10^8m/s

    Explanation:

    Ok we know that refractive index is given as = sin i/ sin r

    And i is the angle of incidence in the air and r is angle of refraction in the glass,

    So we can sa y

    for red light n = sin75/sin38.1 = 1.57

    and for violet, n =sin75/sin36.7 = 1.61

    So

    (a) 1.57, 1.61

    (b) we know that

    Refractive index n = c/v,

    where c is speed off light in air and v is speed of light in glass,

    So , v = c/n

    for red light v = c/1.57 = 1.91 x 10^8 m/s

    and for violet light, v = c/1.61 =

    1.86 x 10^8 m/s

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