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Last updated date: 06th Dec 2023
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# The seven colors of incident light can be recombined when two prisms are placed in ?

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Hint:Light bends on the interface of two media. These refractions are different for different wavelengths, and can be negated by putting an inverted prism in the path of dispersed light. Since light has different speeds in different media the light rays bend at the interface of two media, due to change in respective wavelengths.

$\mu =\dfrac{\sin i}{\sin r}$
where $i$ and $r$ are the angles of incidence and refraction respectively. White light is made of seven different colors, each corresponding to a particular wavelength. Each of these wavelengths behaves differently at the interface of two media, i.e., bend a different amount.
The relation between the amount of bending ($\mu$) and the wavelength ‘$\lambda$’ is given by Euler’s equation which is:
$\mu =A+\dfrac{B}{{{\lambda }^{2}}}+\dfrac{C}{{{\lambda }^{4}}}.....$