Manometric light of wavelength 6000 enters a medium. calculate its velocity wavelength and frequency
Wavelength of light in air =6000A°=6000A°×10−8cm/A°=6×10−5cm
The velocity of light in air =3×1010cm/s.
Frequency v of light in air (velocity of light in air in cm/s) ÷
wave length of light in cm =(3×1010cm/s)/6×10−5cm=5×1014Hz.
On entering the medium of refractive index n=1.5 from air, the
velocity of light decreases to c′=c/n=3×1010cmpersec./1.5=2×1010cm/s.
The frequency of light does not change on refraction. So
frequency of light in the medium =5×1014Hz.
To keep the frequency unchanged, the wavelength of light in the
medium also decreases by the same factor as the decrease in the velocity of
light. So altered wavelength of light in the medium= 6000A°/1.5=4000A°.
So frequency of light in the medium =5×1014Hz.
Wavelength of light in the medium =4000A°
Wavelength of light in air =6000A°=6000A°×10−8cm/A°=6×10−5cm
The velocity of light in air =3×1010cm/s.
Frequency v of light in air (velocity of light in air in cm/s) ÷ wave length of light in cm =(3×1010cm/s)/6×10−5cm=5×1014Hz.
On entering the medium of refractive index n=1.5 from air, the velocity of light decreases to c′=c/n=3×1010cmpersec./1.5=2×1010cm/s.
The frequency of light does not change on refraction. So frequency of light in the medium =5×1014Hz.
To keep the frequency unchanged, the wavelength of light in the medium also decreases by the same factor as the decrease in the velocity of light. So altered wavelength of light in the medium= 6000A°/1.5=4000A°.
So frequency of light in the medium =5×1014Hz.
Wavelength of light in the medium =4000A°
