Question

The refractive index of a certain glass is $1.5$ for light where wavelength in vacuum is $6000A^{o}V$ The wavelength of this light when it passes through the glass is ___________.

• A. $4000A^o$
• B. $6000A^o$
• C. $9000A^o$
• D. $15000A^o$

Answer 1

The correct option is A $4000A^o$

The wavelength of the light is given as,

${\lambda }_m=\frac{{\lambda }_{air}}{\mu }$

$=\frac{6000}{1.5}$

$=4000\stackrel{\circ }{A}$

Thus, the wavelength of the light when it passes through glass is $4000\stackrel{\circ }{A}$.