The Dependence of the Index of Refraction on Wavelength Is $\circ$

question 18

Multiple Choice

The dependence of the index of refraction on wavelength is called dispersion.A beam of light (in air) containing red and blue light is incident at an angle of 35 ^$\circ$ on a glass plate that has an index of refraction of 1.64 for blue light and 1.61 for red light.By what percent does the speed of the red light exceed that of the blue light inside the glass,i.e.calculate (v(red) -v(blue) ) * 100 / v(red) ?

• A)1.1%
• B)1.8%
• C)0.53%
• D)The speed is the same for both colors.
• E)0.019%

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