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  4. Green light of wavelength 5460 mathringA is incident on an air glass interface. If the refractive index of glass is 1.5, the wavelength of light in glass would be ( c =3 × 108 ms -1)

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Q. Green light of wavelength $5460 \,\mathring{A}$ is incident on an air glass interface. If the refractive index of glass is $1.5$, the wavelength of light in glass would be $\left( c =3 \times 10^{8}\, ms ^{-1}\right)$

BITSATBITSAT 2021

Solution:

$a ^{\lambda} g =\frac{\lambda_{ a }}{\mu}=\frac{5460}{1.5}=3640 \,\mathring{A}$