Tag: perceive colours

Questions Related to perceive colours

If the refractive indices of a prism for red, yellow and violet colours be 1.61, 1.63 and 1.65 respectively, then the dispersive power of the prism will be:

perceive colours resolution of optical instruments lenses option c: imaging physics

  1. $\dfrac { 1.65-1.62 }{ 1.61-1 }$

  2. $\dfrac { 1.62-1.61 }{ 1.65-1 }$

  3. $\dfrac { 1.65-1.61 }{ 1.63-1 }$

  4. $\dfrac { 1.65-1.63 }{ 1.61-1 }$

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Correct Option: C
Explanation:

Dispersive power of the prism=$\dfrac{\mu _v-\mu _r}{\mu _y-1}=\dfrac{1.65-1.61}{1.63-1}$