The wavelength of helium-neon laser is 632.8 nm. What is the wavelength of the a
ID: 1554249 • Letter: T
Question
The wavelength of helium-neon laser is 632.8 nm. What is the wavelength of the a laser light through a glass tube, whose index of refraction is 1.5(in m)? What is the angle of refraction in the system shown below (in degrees)? What is the speed of light in the bottom layer (in m/s)? In the system shown below, what is the angle of refraction in the middle layer (in degrees)? What is the angle of refraction in the bottomlayer (in degrees)? At what angle will total internal reflection occur for the system shown below (in degrees)? In the system shown below the incident ray is unpolarized. At what angle will the reflected ray be polarized perpendicular to the plant of incidence (in degrees ?)Explanation / Answer
1) refractive index n = lamda_o/lamda
lamda = lamda_o/n = (632.8*10^-9)/1.5 = 421.86 nm
2) Using snell's law
a) n1*sin(i) = n2*sin(r)
1.25*sin(15) = 1.75*sin(r)
sin(r) = (1.25/1.75)*sin(15) = 0.464
r = sin^(-1)(0.464) = 27.64 deg
b) speed of light is V2 = V1/n2 = (3*10^8)/(1.25*1.75) = 1.37*10^8 m/sec
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.