Question

A light ray having wavelength of 6000passes through a medium of refractive index 1.5 then what will be the wavelength of light in that medium ?solve please showing formulas.

Answer 1

heya.


here is your answer.

Wavelength of light in air = 6000A°= 6000A°×10^-8 cm/A° = 6× 10^-5 cm

The velocity of light in air= 3×10^10 cm/s

Frequency v of light in air (velocity of light in air in cm/s) ÷ wave length of light in cm= ( 3×10^10 cm/s)/6×10^-5 cm= 5×10^14 Hz.

On entering the medium of refractive index n= 1.5 from air, the velocity of light decreases to c'= c/n= 3×10^10 cm per sec./ 1.5 = 2×10^10 cm/s.

The frequency of light does not change on refraction. So frequency of light in the medium= 5×10^14 Hz.

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= 5×10^14 Hz.

Wavelength of light in the medium= 4000A° .



hope helps

Answer 2

Answer:

The speed of light is . Explanation: The refractive index of a medium (n) is equal to the speed of light (c) divided by the velocity of light through the medium (v).