A ray of light of wavelength 720 nm is refracted into a medium of refractive index 1.5. The wavelength of light in the medium is

Question

A ray of light of wavelength 720 nm is refracted into a medium of refractive index 1.5. The wavelength of light in the medium is (A) 1080 nm (B) 720 nm (C) 480 nm (D) 3600 nm

Tardigrade Admin · Accepted Answer

n=(c/v)=(v λ0/v λ) Hence λ=(λ0/n)=(720/1.5)=480 nm

Q. A ray of light of wavelength 720 nm is refracted into a medium of refractive index 1.5. The wavelength of light in the medium is

1080 nm

720 nm

480 nm

3600 nm

$n = \frac{c}{v} = \frac{v λ _{0}}{v λ}$
$He n ce λ = \frac{λ _{0}}{n} = \frac{720}{1.5} = 480 nm$

Q. A ray of light of wavelength 720 nm is refracted into a medium of refractive index 1.5. The wavelength of light in the medium is

1080 nm

720 nm

480 nm

3600 nm

n=vc​=vλvλ0​​ Henceλ=nλ0​​=1.5720​=480nm

$n = \frac{c}{v} = \frac{v λ _{0}}{v λ}$
$He n ce λ = \frac{λ _{0}}{n} = \frac{720}{1.5} = 480 nm$