For a glass, n violet = 1.53, n red = 1.51 and n yellow = 1.52. The dispersive power of the glass is about:

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For a glass, nviolet = 1.53, nred = 1.51 and nyellow = 1.52. The dispersive power of the glass is about:

Answer: 0.038.

A 0.020
B 0.038
C 0.052
D 0.077

Correct answer: B. 0.038

Explanation: Dispersive power ω = (nviolet − nred)/(nyellow − 1) = 0.02/0.52 = 0.038.

Concave mirror ray diagram with an object drawn as a candle on the principal axis, the focal point F marked, and the parallel ray and focal ray reflecting to form an inverted real image

Concave mirror ray construction: a ray parallel to the axis reflects through F, and a ray through F reflects parallel, locating the inverted real image. Image: Maxmath12, CC0, via Wikimedia Commons.

Concept context

Reflection, refraction, lenses, mirrors, total internal reflection.

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For a glass, n<sub>violet</sub> = 1.53, n<sub>red</sub> = 1.51 and n<sub>yellow</sub> = 1.52. The dispersive power of the glass is about:

Concept context

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