The refractive index of certain glass is 1.5 for light whose wavelength in vacuum is 6000 mathringA. The wavelength of this light when it passes through glass is:

Question

The refractive index of certain glass is 1.5 for light whose wavelength in vacuum is 6000 mathringA. The wavelength of this light when it passes through glass is: (A) 4000 mathringA (B) 6000 mathringA (C) 9000 mathringA (D) 15000 mathringA

Tardigrade Admin · Accepted Answer

As we know, μ=( c / v ) ⇒ ( n λ1/ n λ2) (Frequency remains same in all medias) ∴ μ=(λ1/λ2) λ2=(6000/1.5)=4000 mathringA

Q. The refractive index of certain glass is $1.5$ for light whose wavelength in vacuum is $6000 \overset{˚}{A}$ . The wavelength of this light when it passes through glass is:

$4000 \overset{˚}{A}$

$6000 \overset{˚}{A}$

$9000 \overset{˚}{A}$

$15000 \overset{˚}{A}$

As we know,
$μ = \frac{c}{v}$
$\Rightarrow \frac{n λ _{1}}{n λ _{2}}$
(Frequency remains same in all medias)
$∴ μ = \frac{λ _{1}}{λ _{2}}$
$λ_{2} = \frac{6000}{1.5} = 4000 \overset{˚}{A}$

Q. The refractive index of certain glass is 1.5 for light whose wavelength in vacuum is 6000A˚. The wavelength of this light when it passes through glass is:

4000A˚

6000A˚

9000A˚

15000A˚