The wavelength of light is 589 nm. What ...

The wavelength of light is 589 nm. What is its wavelength in Å ?

9372 Å

7932 Å

7548 Å

3927 Å

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The correct Answer is:

(d) Given, wavelength in vaccum = 5890 Å
In a medium of refractive index, the wavelength of light decreases to `lamda/mu = 5890/1.5=3927 Å`

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