The sinusoidal voltage source in the circuit vg = 240 cos(5,000t) vrms.
a. find the thévenin voltage with respect to the terminals a, b. express your answer in polar form (make the magnitude positive and the angle negative). | vth | = answer v angle = answer ° (degrees)
b. find the thévenin impedance with respect to the terminals a, b. express your answer in polar form (make the magnitude positive and the angle negative). | zab | = answer ω (ohm) angle = answer ° (degrees)

wavelength variability is the right one

i will answer your question if you answer mine

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.