Find the frequency of light whose wavelength is 500 nm. Find the speed of light

Question

Find the frequency of light whose wavelength is 500 nm. Find the speed of light whose wavelength is 600 nm If the frequency of light of a certain color is 5 X 10^-4 Hz, what is its wavelength? What is the speed of light in a material whose refractive index is 1.5? What is the wavelength of a ray of light whose wavelength is 500 nm in vacuum, when it travels through a medium of refractive index 1.5? What is the frequency of a ray of light whose wavelength is 500 nm in vacuum, when it travels through a medium of refractive index 1.5? A polarizer has its axis parallel to the y-axis. Mow much light does it let through if the incident light is polarized along the x-axis? A polarizer has its axis parallel to the y-axis. How much light docs it let through if the incident light is polarized? Initially polarized light is sent into a system of three polarizing sheets whose polarizing directions nuke angles of 0, = 20 degree. = 40 degree. theta, = 60 degree with the direction of the y axis. What percentage of the light's initial intensity is transmitted by the system? Initially polarized light is sent into a system of three polarizing sheets whose polarizing directions make angles of theta, = 90 degree, theta_2 = 60 degree, theta_j - 30 degree with the direction of the y axis, the initial direction of polarization is along the y-axis. What percentage of the light's initial intensity is transmitted by the system?

Explanation / Answer

1) wavelength = 500 nm

frequency of light = speed of wave/wavelength

frequency of light = 3 *10^8/(500 *10^-9)

frequency of light = 6 *10^14 Hz

2)

speed of light is constant

the speed of light with wavelength 600 nm is 3 *10^8 m/s

3)

frequency = 5 *10^14 Hz

wavelength = speed of light/frequency

wavelength = 3 *10^8/(5 *10^14)

wavelength = 6 *10^-7 m

wavelength = 600 nm

4)

speed of light in medium = speed of light in vacuum/refcrative index

speed of light in medium = 3 *10^8/1.5

speed of light in medium = 2 *10^8 m/s

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